Test 1

Question 1

atomic number

Answer 1

number of protons

Question 2

electron number

Answer 2

atomic number

Question 3

mass at neutral weight

Answer 3

protons and neutrons
the atomic mass

Question 4

neutrons

Answer 4

mass number- atomic number
never a fraction or decimal

Question 5

Bohrs Experiment Explained

Answer 5

Energy is given to gaseous atoms and causes the neg. electron to jump to higher energy levels

Question 6

periodic Law

Answer 6

elements arranged in order of increasing atomic numbers

physical
hardness changed as we move across the table

chemical
reactivity with H2O or air

Question 7

electron counts

Answer 7

increases by one across any period (left to right)

Question 8

proton count

Answer 8

increases by one across any period (left to right)

Question 9

neutron count

Answer 9

generally increase but the trend isn’t perfect

Question 10

mass

Answer 10

generally increases as protons and neutrons are added

Question 11

chemical reactivity

Answer 11

highest reactivity is at the start of any period then reactivity decreases. Reactivity begins to gradually increase until the extremely reactive halogens

Question 12

Lewis Dot Diagrams

Answer 12

dots are drawn for valence
no shell shown, no protons, no neutrons

Question 13

observation

Answer 13

a statement that is based on the 5 senses

Question 14

inference

Answer 14

judgement or opinion based on observations

Question 15

theoretical knowledge

Answer 15

knowledge based on ideas that are shared to explain observations

Question 16

theory

Answer 16

an explanation of a large number of related observations

Question 17

model

Answer 17

a representation of a theoretical concept

Question 18

electron affinity

Answer 18

the amount of energy involved in gaining an electron

Question 19

electronegativity

Answer 19

a chemical property that descibes the tendency of an atom or a functional group to attract electrons toward itself

Question 20

electronegativity trends

Answer 20

increasing across a period
decreasing down a group

Question 21

what is group 1 on the periodic table?

Answer 21

alkali metals

Question 22

what is group 2 on the periodic table?

Answer 22

alkaline earth metals

Question 23

what is group 7 on the periodic table?

Answer 23

halogens

Question 24

what is group 8 on the periodic table?

Answer 24

noble gases

Question 25

what is an isotope

Answer 25

atoms with the same number of protons but a different number neutrons

Question 26

how do metals react

Answer 26

they lose electrons until the valance shells empty

Question 27

on the periodic table, the most reactive metal is where

Answer 27

at the bottom of the group, which means moving down the group reactivity is increasing | larger atoms lose electrons more easliy

Question 28

definition of non metals

Answer 28

based on how easily the atom can fill the valence shell

Question 29

moving down a group of non metals reactivity

Answer 29

decreases

Question 30

moving across the period non metals reactivity

Answer 30

increases | elements further right are smaller therfore attract electrons