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weeeeeb [17]
3 years ago
9

Atomic radius increases as you move down a group of elements.

Chemistry
1 answer:
raketka [301]3 years ago
3 0
Yes, the atomic radius increases as you move down a group of elements.  this is true
going down leads to valence electrons that are further away from nucleus -> less electrostatic attraction -> less pull towards nuc. -> greater radius/volume taken
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ΚΕ:<br> m.22<br> 2<br> What is the kinetic energy of 10kg dog running with a velocity of 12m/s?
BigorU [14]

Answer:

The answer is

<h2>720 Joules</h2>

Explanation:

The kinetic energy of a body can be found by using the formula

<h3>K.E =  \frac{1}{2}  {mv}^{2}</h3>

where

m is the mass

v is the velocity / speed

From the question

mass = 10 kg

velocity = 12 m/s

Substitute the values into the above formula and solve

That's

<h3>KE =  \frac{1}{2}  \times 10 \times  {12}^{2}  \\   = 5 \times 144  \:  \:</h3>

We have the final answer as

<h3>720 Joules</h3>

Hope this helps you

3 0
3 years ago
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Helen [10]
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5 0
3 years ago
Metals give up electrons to become cation or anion
galina1969 [7]
Metals usually become cations since electrons are negatively charged and when they are lost there are more protons than electrons making a positive net charge in the atom.  (cations are positively charged ions while anions are negatively charged ions)

I hope this helps.  Let me know if anything is unclear.
8 0
3 years ago
Read 2 more answers
Ca(OH)2 - How many Carbon, how many oxygen, and how many hydrogen in this formula? - please explain
aksik [14]

Answer: 1Ca + 2O + 2H

Explanation:

Ca is 1 since there is no subscript

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3 0
2 years ago
What are the atomic number and mass number for the carbon isotope with seven neutrons?
Nady [450]

Answer:

The answer to your question is:  

atomic number (Z): 6

mass number (A) : 13

Explanation:

Carbon has an atomic number of 6 and a mass number of 12,

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12 = 6 + # neutrons

#neutrons = 12 - 6 = 6

For the carbon isotope the atomic number does not change is still 6

 13 = 6 + # neutrons

# neutrons = 13 - 6

# neutrons = 7

7 0
3 years ago
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