Atoms

Question 1

name of the first atom experiment model

Answer 1

plum pudding model

Question 2

what was the plum pudding model?

Answer 2

a solid positive charge packed with negative electrons

Question 3

what experiment disproved the plum pudding model?

Answer 3

alpha scattering experiment

Question 4

what did the alpha scattering model prove?

Answer 4

that the atom was mainly empty space

Question 5

what model was proposed from the alpha scattering experiment?

Answer 5

the nuclear model

Question 6

what did the nuclear model consist of?

Answer 6

a nucleus in the middle, containing protons and neutrons, with electrons circling around it

Question 7

where is the atomic mass?

Answer 7

above the chemical symbol

Question 8

where is the proton number?

Answer 8

below the chemical symbol

Question 9

how do you find the number of electrons in an atom?

Answer 9

the same as protons

Question 10

how do you find neutrons?

Answer 10

mass number - protons = neutrons

Question 11

what is the name of group 7 elements?

Answer 11

halogens

Question 12

how reactive are group 7 elements?

Answer 12

highly reactive

Question 13

what are group 0 elements named?

Answer 13

noble gases

Question 14

how reactive are group 0 elements?

Answer 14

inert

Question 15

how does the reactivity change as you go down group 7?

Answer 15

decreases, as the amount of electrons increase

Question 16

what are the boiling points of group 0 elements like?

Answer 16

high

Question 17

what are group 1 elements called?

Answer 17

alkalis

Question 18

how does the reactivity of group 1 elements change as you go down the group?

Answer 18

increases, as the attractive electrostatic force is weaker

Question 19

what is an element?

Answer 19

a substance that cannot be chemically broken apart