periodic table core questions

Question 1

define atom

Answer 1

tiny particles

Question 2

define molecule

Answer 2

a group of atoms bonded togther

Question 3

what are substances made of only one type of atom called

Answer 3

elements

Question 4

what are substances made of two or more types of atoms chemically bonded called

Answer 4

compounds

Question 5

what is the word for an element that always exists as two atoms bonded together

Answer 5

diatomic

Question 6

which elements exist diatomically

Answer 6

oxygen nitrogen hydrogen and all of group 7

Question 7

define a period

Answer 7

rows in the periodic table of elements

Question 8

define group

Answer 8

columns of the periodic table

Question 9

which side of the periodic table contains metals

Answer 9

left (of the staircase)

Question 10

which side of the periodic table contains non-metals

Answer 10

right (of the staircase)

Question 11

where are alkali metals found in the periodic table

Answer 11

group 1

Question 12

where are halogens found in the periodic table

Answer 12

group 7

Question 13

give 4 properties of metals

Answer 13

high melting point
good thermal and electrical conductors
ductile
malleable

Question 14

give 4 properties of non-metals

Answer 14

low melting point
poor thermal and electrical conductors
brittle

Question 15

what is the name for the smaller number given for each element

Answer 15

atomic number

Question 16

what is the name for the bigger number given to each element

Answer 16

mass number

Question 17

name 6 alkali metals in order of reactivity

Answer 17

lithium sodium potassium rubidium caesium francium

Question 18

when cut how do alkali metals first appear

Answer 18

shiny

Question 19

what is formed when alkali metals react with water

Answer 19

alkaline metal hydroxide

Question 20

what happen to the reactivity of the alkali metals as you move down the group

Answer 20

increases

Question 21

how are elements arranged on the periodic table

Answer 21

in order of atomic number (lowest to highest)

Question 22

what is the name for the elements in the middle of the periodic table the ae not in a group

Answer 22

transition metals

Question 23

what did Mendeleev do when creating the modern

Answer 23

left gaps for future elements as some were predicted

Question 24

how did Mendeleev justify leaving gaps in the tabel

Answer 24

he said new elements would be discovered that would fit in the gaps

Question 25

why was Mendeleev’s table accepted

Answer 25

he predicted the properties of the future elements

Question 26

name 5 halogens in order of reactivity

Answer 26

astatine iodine bromine chlorine fluorine

Question 27

state 3 properties of halogens (group 7)

Answer 27

non-metal highly reactive diatomic

Question 28

what happens to the reactivity as you move down the halogens

Answer 28

decreases

Question 29

name 3 noble gases

Answer 29

helium neon argon

Question 30

state 3 properties of noble gases

Answer 30

non-metal inert(don’t react) gases

Question 31

what type of oxides are acidic

Answer 31

non-metal oxides

Question 32

what type of oxides are alkaline

Answer 32

metal oxides