atoms

Question 1

where a noble gases located

Answer 1

group 18

Question 2

what a groups, verticle or horizontal

Answer 2

verticle

Question 3

are periods verticle or horizontal

Answer 3

horizontal

Question 4

do noble gases have high or low chemical radioactivity

Answer 4

low chemical reactivity

Question 5

what’s a characteristic of the electron configuration of noble gases

Answer 5

they have a full outer shell

Question 6

what are compounds made up of

Answer 6

2 or more different atoms

Question 7

what did Neils Bohr do

Answer 7

he contributed to the shells on the atomic model

Question 8

chlorine (Cl) has 17 electrons. How many electrons does Cl -1 have

Answer 8

18

Question 9

if an atom has -1 to it, does it gain or lose electrons

Answer 9

gains

Question 10

if an atom has +1 to it, does it gain or lose electrons

Answer 10

loses

Question 11

Al +3 is a

Answer 11

Cation

Question 12

what is an atom

Answer 12

the smallest particle of a chemical element that can exist.

Question 13

what is an element

Answer 13

a substance composed of the same type of atoms

Question 14

what did JJ Thompson do

Answer 14

Discovered the electron and proposed the plum pudding model

Question 15

what did Earnest Rutherford do

Answer 15

Discovered the nucleus and that atoms are mostly empty space, with the gold foil experiment

Question 16

What did Neils Bohr do

Answer 16

Discovered the electrons exist in energy levels (shells) which surround
the nucleus

Question 17

how do you get the number of protons and electrons

Answer 17

The atomic number

Question 18

How do you get the number of neutrons

Answer 18

atomic mass - atomic number

Question 19

what is the difference between molecule and compound

Answer 19

Molecule is 2 of the same element and compound is 2 of different element