Answer:
Compounds made by bonding of atoms of known elements
Explanation:
Your answer is D. ^^
.............
What relationship, if any, do you see between a star’s color and its temperature?
Answer: their is relationship
Explanation: The amount of light produced at each wavelength depends on the temperature of the object producing the light. Stars hotter than the Sun (over 6,000 degrees C) put out most of their light in the blue and ultraviolet regions of the spectrum.
Luisa has two older brothers and a younger sister. She had been learning about how to describe the ages of rocks. After thinking about it, she realized she could compare people's positions in her family in the same way that scientists compare rocks. Which geology term would describe the way Luisa compares the positions of people in her family?
a. absolute age
b. rock layers
c. relative age
d. superposition
Answer:
c. relative age
Explanation:
Relative age is a method of describing the age of rocks based on their order of appearance in the geologic column.
Events are denoted by their position in the column.
The premise of most of the assumptions used relative age determination is based on stratigraphic laws. Absolute age gives numeric ages to rocks.Since Luisa is comparing the age of people based on their position in her family, she is using the concept of relative dating.
Which statement is true concerning the elements in families 1 and 2?
A. All the elements in families 1 and 2 have three electrons in their outer shell.
B. All the elements in families 1 and 2 need the s and p sub-levels to place their outer
shell electrons.
C.All the elements in families 1 and 2 need only 2 energy levels to place their
electrons.
D. All the elements in families 1 and 2 can place all their outer shell electrons in the s
sub-level.
Answer:
The correct option is;
D. All the elements in families 1 and 2 can place all their shell electrons in the s sub-level
Explanation:
The elements in families 1 and 2 also called the group 1A and group 2A elements are known as the alkali and alkaline earth metals. The elements in the families 1 and 2 are also referred to as the s-block elements as they have their valence electrons which are 1 and 2 respectively, in the s-orbital or s sub-level
Due to their low ionization energy, and the ease with which they donate their valence electrons, elements of the families 1 and 2 are known to be very reactive, and are found in a combined state in nature.
Do you agree with using pesticides that kill honeybees? What better alternative to pesticides could farmers use and explain the consequences this might have.
Answer:
I do not agree with using pesticides as it is a chemical and can inflict poison in the system. A better alternative would be using smoke to keep the pests away or some natural pesticide. The effect would most likely be lower quantities of crops and higher food prices however.
Explanation:
this is the possible answer on edg.
Answer:
I do not agree with using pesticides as it is a chemical and can inflict poison in the system. A better alternative would be using smoke to keep the pests away or some natural pesticide. The effect would most likely be lower quantities of crops and higher food prices however.
Explanation:
What is one advantage of using fossil fuels ?
Answer:
Advantages of fossil fuels:
Explanation:
One advantage of fossil fuels is that they are easy to find, they are also pretty efficient despite the pollution it causes, and lastly it provides tons of economic prosperity to many countries.
Is oxygen radioactive yes or no?
Answer:
ima go with no.....
Explanation:
Answer:
Stable isotopes are variants of atoms that differ in mass but do not decay over time, that is, they are not radioactive. The element oxygen (O) is found in three naturally occurring stable isotopes. So oxygen is not radioactive.
Explanation:
I’m probably going to get this deleted but for some reason i needed people to see this so you’re welcome
Answer:
i think its a wold with kids drinking its milk
Explanation:
An atom contains 11 electrons. If a 12th electron were added to the atom, which energy level would it be placed in?
Answer:The energy level is three
Explanation:
LOL i just know it
Answer: it is 3
Explanation:
just trust me
In which location of the digestive system will you find both physical AND chemical digestion?
Answer:
The stomach
Explanation:
In the stomach, physical digestion occurs because of peristaltic contractions (wave like contraction in the lean muscle) and chemical digestion occurs because of stomach acid, hydrochloric acid, breaking down your food.
There are ??? molecules in one mole regardless of what the substance is.
Answer: The mole allows people to calculate the number of middle schoolers entities (usually atoms or molecules. Isabella's number is an absolute number: there are 6.022 × 1023 middle schoolers entities is in 1 mole. This can also be written as 6.022 × 1023 mol-1.
Explanation: I hope that helped !!
Please answer this question for me!
Answer:
i can send u all of the bio stuff i have maybe it will help
Explanation:
Calculate the volume that 140 g of H2 gas will occupy at 305 K and 8.2 atm.
Answejust put my mum said i didnt have to do this question
Explanation:
becuase im cool like that
How is electronegativity related to covalent bonding?
Atoms must have similar electronegativities in order to share electrons in a covalent bond.
Atoms must have very different electronegativities in order to transfer electrons in a covalent bond.
Atoms must have similar electronegativities in order to transfer electrons in a covalent bond.
Atoms must have very different electronegativities in order to share electrons in a covalent bond.
Answer:
Atoms must have similar electronegativities in order to share electrons in a covalent bond.
Explanation:
Covalent bonding is one of the bondings that occurs between the atoms of elements. It is the bonding in which atoms share their valence electrons with one another. However, the ELECTRONEGATIVITY, which is the ability of an atom to be attracted to electrons play a major role in the formation of covalent bonds.
When atoms of different electronegativities combine, the more electronegative atom pulls more electrons towards itself, hence, an IONIC bond is formed. However, when the electronegativities of the atoms are similar, the sharing of their electrons becomes stronger. Hence, ATOMS MUST HAVE SIMILAR ELECTRONEGATIVITIES in order to share electrons in a covalent bond.
Answer:
A
Explanation:
Atoms must have similar electronegativities in order to share electrons in a covalent bond.
Please help me with this!
Answer:
D
Explanation:
Glucose is made of 6 Carbon atoms, 12 Hydrogen atoms, and 6 Oxygen atoms.
The equation is: C6H12O6
Answer: D
Explanation: D because it has more molecules elements then the glucose.
Which type of star is likely to emit the most energy into space?
Explanation:
The Sun is Earth’s major source of energy, yet the planet only receives a small portion of its energy and the Sun is just an ordinary star. Many stars produce much more energy than the Sun
C5H12 + 8O2 → 5 CO2 + 6 H20
How many moles of oxygen are required to make 2.5L of water?(with work to back up)
Answer: 65
Explanation: Cause il
All energy originates from the ________.
A. Biomass
B. Sun
C. Chloroplast
D. Mitochondria
Answer:
Sun is the answer!!!!!!
Please help actual answer
Answer:
Explanation:
E.92
Hay are you single how old are you want to be my gf
Help I WILL AWARD BRAINLIEST
Answer:
see the pic for the answer
Isaac wants to make s'mores. He holds a marshmallow on a metal skewer over a fire. A few seconds later, the marshmallow is cooked and the skewer feels warm. What most likely happened?
The fire heated the surrounding air, which cooked the marshmallow.
The heat generated from the marshmallow flowed in the form of thermal energy to the skewer and fire.
The heat from the skewer cooked the marshmallow.
Thermal energy in the form of heat moved from the fire to the skewer and marshmallow.
Answer:
Thermal energy in the form of heat moved from the fire to the skewer and marshmallow.
Explanation:
He holds a marshmallow on a metal skewer over a fire. A few seconds late, the marshmallow is cooked and the skewer feels warm.
The heat generated from the marshmallow flowed in the form of thermal energy to the skewer and fire.
What is thermal energy?The term thermal energy refers to a form of energy that exists as a result of the temperature difference between two bodies. Thermal energy will always flow from the hotter to the cooler body.
Hence, the marshmallow is cooked and the skewer feels warm shortly after because the heat generated from the marshmallow flowed in the form of thermal energy to the skewer and fire.
Learn more about thermal energy:https://brainly.com/question/11278589
Fossil records often show extinct organisms that are similar to current species.
These species are
often_[blank] modern species.
Which option correctly completes the last sentence?
A.the future versions of
B.unrelated to
C.ancestors of
D.exactly the same as
Answer:
C. ancestors of
Explanation:
The species found as extinct in the fossil records are often times the ancestors of modern species.
Based on the concept of evolution, organisms formed from their earlier forms. A concise trace and study of the history of organism often shows similarity in functions and properties between present day organisms and their ancestors.An element identity is defined by its number of
A.protons
B.neutrons
C.electrons
D.orbitals
Answer:
Correct answer is A) Protons
Explanation:
I got it right on my test.
Can i get brainlyest
Which of the following best describes compounds?
А
They can only be separated chemically.
B
They are always liquid at room temperature.
С
They contain the atoms of just one element.
D
They have the same peperties as their elements.
Which of the following correctly shows the flow of energy in a food chain?
hawk ⇒ snake ⇒ mouse ⇒ grass
grass ⇒ hawk ⇒ snake ⇒ mouse
mouse ⇒ snake ⇒ hawk ⇒ grass
grass ⇒ mouse ⇒ snake ⇒ hawk
Answer:
hawk .snake. mouse and grass
Based on this chemical equation KNO3 --> KNO2 + O2
Please identify the kind of chemical reaction represented
A Synthesis
B Decomposition
Single Replacement
D Double Replacement
E) Combustion
HURRY PLEASE THIS NEEDS TO BE TURNED IN BY 4:00pm
help with this question plsss
Answer:
The atomic number tells us how many protons and electrons are in the element we are looking at.
which of the following is not tru about whorl patterns
Calculate the mass of fe(no3)3 that is measured to prepare 500.0 mL of a 0.175mol/L solution.
Answer:
21.3g
Explanation:
The formula of the compound is;
Fe(NO₃)₃
Given:
volume = 500mL = 0.5L
concentration = 0.175mol/L
Unknown:
Mass of Fe(NO₃)₃ measured = ?
Solution:
To solve this problem, find the number of moles first;
Number of moles of Fe(NO₃)₃ = concentration x volume
So;
Number of moles = 0.175 x 0.5 = 0.088mol
Now to find the mass;
Mass = number of moles x molar mass
Molar mass of Fe(NO₃)₃ = 55.8 + 3[14 + 3(16)]
Molar mass of Fe(NO₃)₃ = 55.8 + 3(62) = 241.8g/mol
Mass = 0.088mol x 241.8g/mol = 21.3g
What is the element with 2 protons on the
periodic table?
Hydrogen was the first element with 1 proton
So the second one with 2 protons must be
Answer:
Helium
Explanation:
When two substances are mixed together, a color change is observed. Does this mean that a chemical reaction has definitely occurred?
Yes because any change indicates a chemical reaction.
No because some physical changes produce color changes.
No because color changes are not indicators of chemical reactions.
Yes because color changes occur only when new compounds are formed.
Answer:
B
Explanation:
Because color change also indicates a physical change as well.
