atoms

Question 1

Neils Bohr

Answer 1

developed the Bohr model that proposed that negative electrons orbit the nucleus

Question 2

How many electrons are in the 1st energy level?

Answer 2

2

Question 3

How many electrons are in the second energy levels?

Answer 3

8

Question 4

How many electrons are in the third energy level?

Answer 4

18

Question 5

How many electrons are in the 4th energy level?

Answer 5

32

Question 6

What do the elements in groups on the periodic table have in common?

Answer 6

they have the same # of valence electrons

Question 7

What do elements in the same period have in common?

Answer 7

they have the same # of energy levels

Question 8

isotope

Answer 8

same # of protons, diff # of neutrons

Question 9

ionic bonds

Answer 9

gain or lose electrons

Question 10

What happens to an element that loses electrons?

Answer 10

it becomes a cation or positive ion

Question 11

What happens to an element that gains electrons?

Answer 11

it becomes a anion or a negative ion

Question 12

covalent

Answer 12

sharing of electrons

Question 13

monomer

Answer 13

react w/ other molecules to make polymers