what is the reason for the trend in the power of the nucleus going across a period?
Answers
Answer:
Please Mark as the Brainliest!!!!! PPPPPPPPPLLLLLLLLLSSSSSS
Explanation:
Across a period, effective nuclear charge increases as electron shielding remains constant. This pulls the electron cloud closer to the nucleus, strengthening the nuclear attraction to the outer-most electron, and is more difficult to remove (requires more energy).
Related Questions
ANYONE KNOW THIS ILL GIVE YOU BRAINLIEST..... the question is a variety of energy transformations occur in different situations which statement involves change from chemical to electromagnetic to mechanical to sound energy..... The pic are the answer choices
Answers
GREETINGS!
IT SHOULD BE OPTION C
Because when you use mobile the chemical energy stored in the battery is used to make your mobile work, and Mobile phones communicate by Electromagnetic radio waves, and if u look at the option C it says PLAYS A VIDEO ON YOOOUTUBE that means sound energy so c is your answer
HOPE THIS HELPS YOU!
Please help asap thank u
Answers
Answer: Xenon- 144
Explanation: It's D
Why do people with diabetes have a hard
time keeping a balance blood-glucose
level?
A they don't synthesize any hormones to keep
their blood pH in check
B they don't synthesize any insulin hormone, to
help shuttle glucose into the cell when there
is a need
C They don't synthesize any glucagon hormone,
to help shuttle extra glucose out of the cell
when there is too much
D they don't synthesize any hormones to keep
their blood pressure in check
Answers
Answer:
d i have diabities too
Explanation:
GREETINGS!
It is B
Explanation:
The Diabetes mellitus, commonly known as diabetes, is a metabolic disease that causes high blood sugar. In diabetes, your body either doesn't make enough insulin or can't effectively use the insulin it does make.
there are two types of diabetes
Type 1 is where your pancreas just don't make insulin but In Type 2 diabetes (adult onset diabetes), the pancreas makes insulin, but either the liver, muscle etc cells lose insulin receptor on its membrane or insulin just doesnt work properly
I HOPE IT HELPS!
How much energy is required to raise the temperature of a
300.0 gram block of lead from 22.3°C to 59.9°C? The specific
heat of lead is 0.129 J/gºC.
Round your answer to the nearest whole number.
Answers
Answer:
Q = 1455 J
Explanation:
Given data:
Mass of block = 300 g
Initial temperature = 22.3 °C
Final temperature = 59.9°C
Specific heat of lead = 0.129 j/g.°C
Energy required = ?
Solution:
Formula:
Q = m.c. ΔT
Q = amount of heat absorbed or released
m = mass of given substance
c = specific heat capacity of substance
ΔT = change in temperature
ΔT = T2 - T1 = 59.9°C - 22.3 °C
ΔT = 37.6 °C
Q = 300 g × 0.129 j/g.°C × 37.6 °C
Q = 1455 J
(03.06 LC)
Which statement is true for dipole-dipole forces? (4 points)
Group of answer choices
They are stronger than hydrogen bonding forces.
They are weaker than London dispersion forces.
They occur between ions and polar molecules.
They occur between polar molecules.
Answers
Answer:
They are stronger than hydrogen bonding forces
Answer:
They occur between polar molecules.
Explanation:
I was answering the test and searched through my notes. This is the correct one.
Proof:
Check the attached picture.
Can someone help me, please?
Answers
Answer:
the answer is weak base
Which statement describes an exothermic reaction?
A. Energy is absorbed by the reaction.
B. Energy is released by the reaction.
C. No energy is transferred by the reaction.
D. Energy is created in the reaction.
Answers
Answer:
Energy is released by the reaction
Explanation:
The statement which describes an exothermic reaction is that energy is released by the reaction.
What is an exothermic reaction?An exothermic reaction is defined as a chemical reaction which involves release of energy in the form of light,heat .In these reactions, energy is transferred from system to surroundings rather than taking energy from surroundings into system as in endothermic reactions.
In an exothermic reaction,change in enthalpy is negative.Therefore, it can be inferred that net amount of energy which is required to start the exothermic reaction is less than the net amount which is released by the reaction.
Examples of exothermic reactions are combustion reactions, detonation of nitroglycerin , neutralization reactions and nuclear fission.
Learn more about exothermic reactions,here:
https://brainly.com/question/10373907
#SPJ2
An ionic bond occurs between what particles?
two neutral atoms
a positive and negative ion
two negative ions
two positive ions
Answers
Answer:
a positive and negative ion
Explanation:
An ionic bond is a type of chemical bond formed through an electrostatic attraction between two oppositely charged ions. Ionic bonds are formed between a cation, which is usually a metal, and an anion, which is usually a nonmetal. A covalent bond involves a pair of electrons being shared between atoms.
Answer:
A positive and negative Ion. I took the test!
Explanation:
An ionic bond occurs between what particles?
two negative ions
a positive and negative ion
two neutral atoms
two positive ions
Explain how the components of cell theory relate
to these experiments.
NEED FAST
Answers
Answer:
All organisms are made of cells. Cells are the smallest unit of life. ...
Cells are the most fundamental unit of life. Organisms can be single cells, which hold all of the components necessary for a metabolism, or they can be more complex. ...
Cells come from other cells.
what type of waves have the shortest wavelength?
Answers
Answer:
What are the answer choices
Explanation:
18 karat rose gold is made up of 75% gold, 21% copper, and 4% silver.
This mixture is a ______
alloy
suspension
compound
element
Answers
Life cannot be completely defined by the physical sciences.
True or false
Answers
Answer:
False
Explanation:
Everything is made of science
CHEM PLEASE HELP!! WILL GIVE BRAINLIST
Answers
Answer:
Oxygen, 15.9994
Explanation:
Use the dominant isotope
What is the temperature -36°C expressed in kelvin?
Answers
The answer you're looking for is: 237.15
M+ is an unknown metal cation with a plus one charge. As it dissolves the chloride of the unknown metal, MCL, in enough water to make 100 mL of solution. The student the next is a solution with excess AgNO3 solution, causing a GCL to precipitate. The student collects a precipitate by filtration
Answers
The question is incomplete; the complete question is;
M+ is an unknown metal cation with a +1 charge. A student dissolves the chloride of the
unknown metal, MCl, in enough water to make 100.0 mL of solution. The student then mixes the
solution with excess AgNO3 solution, causing AgCl to precipitate.
The student collects the precipitate by filtration, dries it, and records the data shown
below. (The molar mass of AgCl is 143 g/mol.)
Mass of unknown chloride, MCl 0.74 g
Mass of filter paper 0.80 g
Mass of filter paper plus AgCl precipitate 2.23 g
1. What is the identity of the metal chloride?
(A) NaCl
(B) KCl
(C) CuCl
(D) LiCl
Answer:
KCl
Explanation:
Mass of paper= 0.80 g
Mass of paper and AgCl=2.23
Hence mass AgCl = 2.23 - 0.80 = 1.43g AgCl
Number of moles of AgCl= 1.43g AgCl / 143g/mol AgCl = 0.01 moles AgCl
Since Ag+ and Cl- are in a mole ratio of 1:1 so:
number moles Ag+ = number moles Cl-,
Thus Ag+ has 0.01 moles and Cl- has 0.01 moles
- MCl is also in a 1:1 ratio
Hence;
number of moles of moles Cl- =number of moles of moles M+ = 0.01 moles of M+ and Cl-
Thus;
0.01 Cl- = x/35.45 = 0.3545g of Cl-
mass of MCl = 0.74g
Mass of M+ =0.74g MCl - 0.3545g Cl- = 0.3955g of M+
Number of moles of M+ =0.3955g M+/x =0.010 mol M+
x= 39.55g of M+
K+ has a molar mass of approximately 39.10
Hence KCl is the answer
Which answer below correctly identifies the type of change and the explanation for the boiling of water?
physical change because even though the change caused the temperature of the water to
increase, the water's physical properties remained exactly the same
physical change because even though gas formation was observed, the water was undergoing a
state change, which means that its original properties are preserved
chemical change because gas formation was observed, which indicated that the water was
transformed into a different substance
chemical change because a temperature change was observed, which indicated that the water
was transformed into a different substance
Answers
because the molecule is changing physical states(water to steam) when a chemical change is when two molecules bind together to form a new molecule
What was the nickname given to Mendeleyev by the other chemists in Europe? Why did they give him that name?
Answers
Answer:
Low Chemist
Explanation:
A scientific name that was given to only the nobleist of its time.
what is the name for the ionic compound formed between Cu2+ and CIO2-
Answers
Chloroplasts _____. are filled with chlorophyll make carbon dioxide are taken in through plant leaves are not needed to make food
Answers
Answer:
Are filled with chlorophyll.
Explanation:
Chlorophyll is found inside plant cells in tiny oval-shaped bodies called chloroplasts.
Answer:
Are filled with chlorophyll.
Explanation:
hope this helps∑∑What do a light bulb, a toaster, a radio, and a computer all have in common?
Answers
Answer:
they all use electric
Explanation:
they plug into things like the light gets screwed into the thing and the rest can plug into the wall
Answer:
they all are are use electricity
Explanation: a light bulb a toaster a radio and a computer all use electricity
(True or false) all forces acting Paris
Answers
Answer:
False.
Explanation:
The answer is False that all forces acting Paris.
I hope this helps!! If so please consider marking brainliest!!In which state of matter do the particles have the greatest amount of energy
Answers
Answer:
The answer is gas
Explanation:
Because the parcticles move around the most when in gas form
Can I be brainliest plz
HELP ME PLEASE!
An increase in demand for a product in a market economy will result in:
A. the price of the product increasing.
B. the supply for the product decreasing.
O
c. the scarcity of the product decreasing.
D. the opportunity cost of the product increasing.
SUBMIT
Answers
Answer:
A. the price of the product increasing
Answer: A
Explanation: I just took the quiz
Hope this helps!!
1. What is a fat molecule that includes oils, waxes and steroids? *
(2 Points)
protein
lipid
element
carbohydrate
different kinda
Answers
____ helps your blood clot (scab or bruise)
Answers
I need the answer to question 8 please
Answers
Answer:
Explanation:
14.0x20.0=280
Which of the following lists the levels of organization from least complex
to most complex?
A: organ,organ,system,cell,tissue,organism
B: tissue,organ,cell,organ,system,organism
C:tissue,organism,organ,organ,system,organism
D: cell,tissue, organ,organ, system, organism
E:organism, organ, system, organ, tissue, cell
Answers
Answer:
the answer is e opinion
Answer: D
Explanation: the cell is the least complex, cells make tissues, tissues make organ, organs make organ systems, organ systems make organisms
All ions and isotopes of an atom share the same____
A)atomic number
B)mass number
C)radio waves
D)charge
Answers
Answer:
A atomic number
Explanation:
not too sure
How did Robert Hooke contribute to the cell theory?...
Answers
Fill in the blank: The units Hertz (Hz) is used to express _________________________. options: wave period wavelength amplitude frequency
Answers
Answer:
Hertz is the rate at which current changes direction. SO frenquency
Explanation:
