Elements and atoms

Question 1

What is a compound?

Answer 1

Two or more elements and/or compounds chemically joined

Question 2

What is a mixture?

Answer 2

Two or more elements and/or compounds mixed together but not chemically joined

Question 3

What is an element?

Answer 3

A substance that cannot be broken down into other substances

Question 4

What is a molecule?

Answer 4

two or more chemically joined atoms

Question 5

In the periodic table, what is a row also called?

Answer 5

A period

Question 6

In the periodic table, what is a collumn also called?

Answer 6

A group

Question 7

In the periodic table, how do you group elements into groups?

Answer 7

Elements with the same number of electrons in the outer shell are in the same group

Question 8

In the periodic table, how do you group elements into periods?

Answer 8

Elements with the same number of shells are in the same period

Question 9

What is an atom?

Answer 9

The smallest part of an element that can exist

Question 10

What is a chemical formula?

Answer 10

A formula that shows the relative amounts of atoms of each element in a compound

Question 11

What is a chemical symbol?

Answer 11

A one-letter or two-letter code used by scientists in all countries

Question 12

All metals take the shape of…

Answer 12

… A lattice

Question 13

Copper sulfate + iron ->

Answer 13

iron sulfate + copper

Question 14

What do you add to the end of an element in a compound if it has oxygen in it?

Answer 14

-ate (Sulfur->sulfate)

Question 15

What do you add to the end of an element in a compound if it doesn’t have oxygen in it?

Answer 15

-ide (Sulfur->sulfide)

Question 16

What is a lattice?

Answer 16

A regular array of particals

Question 17

When metals and non-metals join together, what shape do they take?

Answer 17

A lattice

Question 18

When non-metals bond together, what shape do they (almost) always take?

Answer 18

A gas molecule

Question 19

What is a shell?

Answer 19

Where you find the electrons in an atom; outside the nucleus

Question 20

How many electrons does the first shell hold?

Answer 20

2

Question 21

How many electrons does the second shell hold?

Answer 21

8

Question 22

How many electrons does the third shell hold?

Answer 22

18 (pretend it’s 8 though)

Question 23

How many electrons does the fourth shell hold?

Answer 23

32

Question 24

What is the nucleus? (chemistry)

Answer 24

Where you find the protons and the neutrons in an atom

Question 25

What is the formula for amount of neutrons?

Answer 25

Mass number - atomic number = neutrons

Question 26

What is an atomic number?

Answer 26

The amount of protons

Question 27

Which direction do periods run in the periodic table?

Answer 27

Horizontally

Question 28

Which direction do groups run in the periodic table?

Answer 28

Vertically

Question 29

What are the group 2 metals called?

Answer 29

Alkali Earth metals

Question 30

An acid + a metal ->

Answer 30

Salt + hydrogen

Question 31

An acid + a metal carbonate ->

Answer 31

Salt + water + carbon dioxide

Question 32

Water + a metal ->

Answer 32

Metal hydroxide + hydrogen

Question 33

Why is hydrogen in the middle of the periodic table?

Answer 33

It does not have the reactive metal properties of group 1