Answer:
Ionization energy tends to increase across a period because the nuclear pull is increasing while shielding is not changing because electrons are in the same energy level. Not only that as we move across a period elements are closer to a full octet.
Explanation:
help me pleaseeee!!!
thissssssssssssss isssssssssssss B
Answer:
The bars and the gymnast's hands
Hope This Helps!
Does Phosphorus (P) gain/lose electrons to form ions
Answer:
phosphorous gain electron to form ions
Explanation:
T or F. Most nonmetals are poor conductors of heat.
Plz answer correctly.
Answer:
True
Explanation:
help please! :)
Why are prefixes not needed in naming ionic compounds?
A. lon charges are written as superscripts with the names of the
atoms.
B. Roman numerals are used instead of prefixes to indicate number.
C. Subscripts are used in the name to indicate number of atoms.
D. Ions combine in only one ratio.
Answer:
Ions combine into only one ratio
Explanation:
Just took test
Prefixes are not used to indicate the number of atoms when writing the chemical formula. The number of atoms are written as subscripts to their chemical symbols.
What is chemical formula?Chemical formula of a compound is used to identify a compound and distinguishes it from other compounds. A chemical formula is written from the chemical symbols of elements which constitute the compound.
The number of atoms of each element is written as the subscripts of the symbols for each atoms. For example,magnesium chloride contains one magnesium and two chlorine atoms thus, its formula is MgCl₂.
The subscripts for each atom in the formula of an ionic compound is the charge of the other atom into which it is bonded. Similarly, the formula of iron oxide containing 2 Fe and 3 O is written as Fe₂O₃.
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How many atoms are in 1.75 moles of neon?
Explanation:
it contains 6.02*1023atoms
Atom, the smallest unit of material which may be separated without releasing electrically charged. It is also the smallest unit of mass with the properties of a chemical element.
Avogadro's number is [tex]\bold{6.022\times 10^{23}}[/tex], which is the number of units in one mole of any material.Calculating of atoms are in 1.75 moles of neon:[tex]\to \bold{ 1.75 \times 6.022\times 10^{23}}\\\\\to \bold{ 10.5385 \times 10^{23}}\\\\[/tex]
Therefore, the answer is "[tex]10.5385 \times 10^{23}[/tex]".
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Describe what happens at faults along a subduction zone.
Answer:
bends and slides under one another
Explanation:
"Where two tectonic plates meet at a subduction zone, one bends and slides underneath the other, curving down into the mantle."
Answer:
Where two tectonic plates meet at a subduction zone, one bends and slides underneath the other, curving down into the mantle. (The mantle is the hotter layer under the crust.) Tectonic plates can transport both continental crust and oceanic crust, or they may be made of only one kind of crust.
if motor bike travels 2.4 km in 5 min find it average velocity?
Answer:
28.8km/h
Explanation:
Change the 5min to hours.
=5/60 =0.0833hrs
Velocity= Distance /Time
2.4/0.0833
=28.8km/h
Look at the image.
What does this image represent?
a) hydroxyl group
b) ether group
c) carbonyl group
d) amine group
Answer:
a carbonyl group
Explanation:
Functional group can be interconverted into each there by the means of suitable reagent. Functional group are responsible for the chemical and physical properties of a compound. The correct option is option D that is amine group.
What is functional group?A group of atoms forming a component of a molecule that accounts for a particular function or chemical behavior is called a functional group. There are so many functional group in organic chemistry. Functional group determine the property of a compound.
The list of functional group are as follow:
Carboxylic group COOH
Alcoholic group OH
Ammine group R-NH₂
Ketonic group R-CO_R
Aldehydic group R-CHO
Thiol group R-S-H
Cyanide group -CN
The given image represent amine group.
Therefore the correct option is option D that is amine group.
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The model of the atom that pictured the atom with electrons randomly distributed throughout the positively charged mass was known as the
Answer:
The cannonball model
Explanation:
Hope this helped!! :)
Heat transfer between two substances is affected by specific heat and the chemical composition of the substances. state of matter of the substances at room temperature. thermal equilibrium of the substances. amount of time and area of physical contact between the substances.
Answer:
the answer is D
Explanation:
Answer:
D. Amount of time and area of physical contact between the substances
Explanation:
This is because with a greater surface area and more physical contact heat transfer can be transferred more quickly
Will give brainliest (idk how to spell) ;-;
The atomic mass of one atom of an element is determined by the number of
protons only
protons and electrons
protons and neutrons
neutrons only
Answer:
#2 bro
Explanation:
Answer: protons and electrons
Explanation: :)
what type of energy is released when electric charge moves between the clouds and ground
4. This neurotransmitter is a part of the brain's "reward system"
(5 Points)
Nicotine
Dopamine
Addiction
Nerves
Answer:
Dopamine
Explanation:
The regions of the brain comprising the “reward system” use the neurotransmitter dopamine to communicate.
Explain why calcium (Ca) has a greater atomic radius than magnesium (Mg).
Answer:
Magnesium nucleus will attract the electrons more toward it and therefore, shrinking the size of the atom. Magnesium atom is smaller than Calcium atom because Calcium has more electron ( 20e− ) which will occupy more energy levels ( n=4 for Calcium versus n=3 for Magnesium)
Why can't we say that acids react with all metals to produce hydrogen ?
Answer:
The more reactive the metal, the more rapid the reaction is. A metal below hydrogen in the reactivity series will not react with dilute acids.
Explanation:
Answer:
Explanation:
Usually when an acid reacts with metal, salt and hydrogen are produced. Acid + metal = salt + hydrogen. Example calcium nitrate + hydrogen. Hope this helps
Which structures do plant cells have for making food that animal cells do not?
mitochondria
vacuoles
lysosomes
chloroplasts
Answer:
Answer
Explanation:
The chloroplast. Animal cells DO NOT make their own food, while chloroplasts are needed in the plant cell to carry out photosynthesis.
Answer:
A Mitochondria is the power house of the cell, So it's not A.
vacuole is the water storage, So it's not B.
the lysosomes remove Waste, Cellular Debris, and foreign particles, So it's not C.
It's D chloroplast create food for the cell .
(Hope this helps :) )
Explanation:
Otto and Olivia each have six markers. Otto is missing the purple and green markers, and
Olivia is missing the black and brown markers. What can they do so that each has a full set?
Answer:
Otto and Olivia should just buy more markers
When a forest burns and all that's left is some ash,
where did most of the mass of the trees go? List the 2 molecules produced. What is the equation for combustion, starting with sugar and oxygen.
Answer:
C₆H₁₂O₆(s) + 6O₂(g) → 6CO₂(g) + H₂O
Explanation:
When a forest burns and all that's left is some ash, most of the mass of the trees go to the atmosphere, in the form of carbon dioxide.
In a total combustion process of organic matter, the two molecules produced are carbon dioxide and water. (CO₂ and H₂O)
The equation for the combustion of glucose is:
C₆H₁₂O₆(s) + 6O₂(g) → 6CO₂(g) + H₂O
Answer: i think C₆H₁₂O₆(s) + 6O₂(g) → 6CO₂(g) + H₂O
Explanation:
pls answer
What type of energy could be converted by using the stationary bikes? From ______ energy to _______ energy.
Answer:
Kinetic energy to Electrical energy.
Explanation:
When stationary bike is pedaled the wheels of the bike rotates which is a form of kinetic energy, this kinetic energy can be converted into electricity when connected to a generator.
From _Kinetic_ energy to _Electrical_ energy.
Scientists have discovered a new virus that is very different from any known viruses. What type of matter is the virus most likely made of?
Combination of protons of some atoms that have not been discovered so far
Combination of protons of different atoms that exist in the periodic table
Compounds made from elements that are not in the periodic table
Compounds made by bonding of atoms of known elements
Answer:
Compounds made by bonding of atoms of known elements
Explanation:
Your answer is D. ^^
.............
Calculate the amount of potential energy a 200 kg car has on top of a 15 m hill
Explanation:
Is this gravitational potential energy?
Please help asap !! it is due at 11:59 tonight
Answer:
boogers
sexExplanation:
love
How do I find the Electrons of a substance? For example, there's like 10 protons & neutrons, how would I find the electrons? Please help ASAP!
Answer:the number of electrons is equal to the number of protons in a neutral atom that is. In a cation or anion atom you either gain or lose electrons. Let’s say it’s a cation +3 you lose 3 electrons. Now let’s say it’s an Anion -3 you gain 3 electrons. Hope this helps.
Explanation:
Why do you think the spacecraft’s speed was different on the Monday, Tuesday, and Wednesday launches?
Answer:
I think because Moving an object against a stronger magnetic force transfers more energy to the magnetic field. Magnetic forces
are stronger closer to magnets. The Wednesday test launch stored more potential energy, and launched the
spacecraft at a faster speed because the stronger magnetic field closer to the magnet resulted in a greater
increase in potential energy.
Explanation:
Hey, it'd be really cool if someone could help me with this-- 15 pts!
Complete and balance this chemical equation: NaClO3 ---> _____
Answer:
NaCI + O2= NaCIO3 I think
Heat can speed up the break down of compounds into two or more simpler substances. This is an example of which type of reaction?
A. synthesis
B. decomposition
C. reaction
D. combustion
Q 1. Element M is a metal that forms compounds of the type MX2, MX3, and MX4, where X is a Chlorine (Cl).
I) What is the expected trend in the ionic radius of M in these compounds?
II) Arrange these compounds in order of decreasing ionic radius of M.
Do not respond if u don’t know the answer. I’ll report it and u will get a warning.
Answer:
See explanation
Explanation:
The ionic radius of metal M decreases as the charge on the metal M increases. The ionic radius is generally defined as the distance between the nucleus and the outermost electron of the ion. Hence, ionic radius becomes much lesser as the magnitude of the positive charge increases.
It is obvious from the various formulae of metal chlorides in the question that the metal forms cations M^2+, M^3+ and M^4+ respectively. The order of decreasing ionic radius of the compounds is;
MX2 > MX3 > MX4
What are two natural and two man-made causes for sudden catastrophic change to an ecosystem
Answer:
Some changes that can occur in ecosystems are seasons, tide cycles, population sizes, succession, evolution, landscape changes, and climate changes.
Explanation:
PLEASE HELP PLEASE
Which of the following is a chemical property?
A: mass
B: oxidizes in air
C: boiling point
D: solubility
Answer:
Oxidizes in air
Explanation:
When water boils, it is still water, just in a different state. solubility and mass are not chemical properties because they don't involve chemical reactions or changing the identity of a substance.
Please mark brainliest!!! Thanks.
Carbon has a half life of 5730 years, how many years would it take a 4 g sample to
decay to .5 g
Answer:
17190
Explanation:
half of 4 is 2 and half of 2 is 1 and half of 1 is .5 so you have now gone through 3 total half lives. Mulitply 5730 and 3.
