Chemistry Quiz #1

Question 1

how many periods and groups are in a periodic table?

Answer 1

7 periods
18 groups

Question 2

what are the 4 group elements in the periodic table?

Answer 2

group 1: alkali metals
group 2: alkaline earth metals
group 17: halogens
group 18: noble gases

Question 3

most reactive metals?

Answer 3

alkali metals (group 1)

Question 4

most reactive non metals?

Answer 4

halogens (group 17)

Question 5

which side of the periodic table is metals and non metals?

Answer 5

right- non metals
left- metals
(middle- metalloids)

Question 6

where are protons and neutrons located?

Answer 6

nucleus of the atom

Question 7

maximum number of electrons in the first/ second/ third orbit…

Answer 7

2
8
8

Question 8

what is an element?

Answer 8

• cannot be broken down chemically
• made up of the same type of atoms
• pure substance
• listed in the periodic table

Question 9

elements in the same group have…

Answer 9

similar physical and chemical properties

Question 10

charge/ symbol/ location of…

Answer 10

proton: positive/ p+/ nucleus
neutron: neutral/ n0/ nucleus
electron: negative/ e/ shells, orbits, energy levels

Question 11

how to find # of protons

Answer 11

atomic number= protons & electrons

Question 12

how to determine # of neutrons in atom

Answer 12

mass # - atomic # = neutrons #

Question 13

physical change:

Answer 13

(usually reversible)
- change of state
- formation of a mixture
- change in shape/form

Question 14

chemical change:

Answer 14

(not reversible)
- new substance
- bubbles/ gas
- light/ heat
- new color
- precipitate ( formed a solid; new substance)
- odour

Question 15

a charge on an atom is created by…

Answer 15

gain or loss of electrons

Question 16

what is an ion?

Answer 16

an atom that has an equal number of protons and electrons, giving it an overall charge

Question 17

when atoms lose electrons, they become ? charged. These ions are called ?

Answer 17

positively
cations

Question 18

when atoms gain electrons, they become ? charged. these ions are called ?

Answer 18

negatively
anions

Question 19

do metals gain or lose electrons to form ions?

Answer 19

lose

Question 20

do nonmetals gain or lose electrons to form ions?

Answer 20

gain

Question 21

valence shell electrons =
energy levels/ orbits/ shells =

Answer 21

group
period

Question 22

ionic compounds consist of…

Answer 22

ions held together by ionic bonds

Question 23

covalent compounds?

Answer 23

non metals held together by covalent bonds (sharing electrons)

Question 24

what group is N (nitrogen) in?
how many valence shells does it have?

Answer 24

group 15
5

Question 25

what group is Mg (magnesium) in? how many valence shells does it have?

Answer 25

group 2 2

Question 26

what group is F (fluorine) in? how many valence shells does it have?

Answer 26

group 17 7

Question 27

what group is Br (bromine) in? how many valence shells does it have?

Answer 27

group 17 7