Chemistry

Question 1

Matter

Answer 1

Anything that has mass (amount of stuff an object has; kg, g, pounds,) and occupies space (object has volume; L, cubic Ft)

Question 2

Building block of matter

Answer 2

Atoms

Question 3

Different atoms of different elements chemically combined make:

Answer 3

Compounds

Question 4

Molecules

Answer 4

Atoms of the same element joined together

Question 5

Aristotle

Answer 5

Came up with the notion that all matter is formed from small particles called atoms

Question 6

John Dalton

Answer 6

Modern atomic theory

Question 7

Positive subatomic particle

Answer 7

Proton

Question 8

Negative subatomic particle

Answer 8

Electron

Question 9

Neutral subatomic particle

Answer 9

Neutron

Question 10

Relative mass (atomic mass unit) of proton:

Answer 10

1

Question 11

Relative mass (atomic mass unit) of electron:

Answer 11

Almost 0

Question 12

Relative mass (atomic mass unit) of neutron:

Answer 12

Slightly more than 1

Question 13

Proton location in atom:

Answer 13

Nucleus

Question 14

Electron location in atom:

Answer 14

Shells around nucleus

Question 15

Neutron location in atom:

Answer 15

Nucleus

Question 16

The proton is ______ x more massive than the electron

Answer 16

1836

Question 17

The neutron is ______ x more massive than the electron

Answer 17

1837

Question 18

J.J Thompson discovered the _____ by using the ___________ tube

Answer 18

Electron, cathode ray

Question 19

J.J Thompson proposed that the atom looked like:

Answer 19

A sphere of positive charge embedded with negative charges called electrons

Question 20

J.J Thompson came up with the plum pudding model of the:

Answer 20

Atom

Question 21

Ernest Rutherford discovered the ________ by using the _____________ experiment

Answer 21

Proton, gold foil

Question 22

Ernest Rutherford proposed:

Answer 22

The nuclear model of the atom with a positive centre, atom is mostly empty space with negative electrons orbiting the nucleus.

Question 23

99.9% of an atom’s mass comes from the:

Answer 23

Nucleus

Question 24

99.9% of an atom’s volume comes from:

Answer 24

Electron clouds (shells)

Question 25

James Chadwick discovered the:

Answer 25

Neutron

Question 26

Isotope:

Answer 26

Atoms of the same element but with different numbers of neutrons. Have different masses. The number of prosit a is always the same for the element’s isotopes. # of protons determines the nature of the atom

Question 27

Mass Number:

Answer 27

The number of protons and neutrons in the atom

Question 28

Atomic number:

Answer 28

The number of protons in the atom

Question 29

Another word for electron shells

Answer 29

Orbitals

Question 30

There are ______ energy levels

Answer 30

Four

Question 31

How many electrons can each shell hold

Answer 31

1 shell: 2 electrons
2 shell: 8 electrons
3 shell: 8 electrons
4 shell: 18 electrons

Question 32

Each lower shell must be completely ______ before the next higher shell can fill up with _______

Answer 32

Filled, electrons

Question 33

Danish scientist Neils Bohr discovered that electrons were arranged in:

Answer 33

Energy levels or shells (orbitals) that orbit around the nucleus of the atom

Question 34

The outermost shell of an atom is called the:

Answer 34

Valence shell

Question 35

The electrons occupying the valence shell are called:

Answer 35

Valence electrons

Question 36

Atoms are neutral

Answer 36

Number of protons = number of electrons

Question 37

Ions are charged particles, there is an _________ of charges

Answer 37

Imbalance

Question 38

An atom that loses electrons is:

Answer 38

A positively charged Cation.

of P > # of E

Question 39

An atom that gains electrons is:

Answer 39

A negatively charged Anion.

of P < # of E

Question 40

Ions are formed by achieving a full

Answer 40

Valence shell

Question 41

of Valence electrons for the Alkali metals:

Answer 41

1

Question 42

of valence electrons for the Alkaline Earth metals:

Answer 42

2

Question 43

of valence electrons for the Halogens:

Answer 43

7

Question 44

of valence electrons for Noble Gases (except Helium):

Answer 44

8

Question 45

A compound is made up of a:

Answer 45

Metal and a non-metal

Question 46

Metals are found on the ______ side of the periodic table

Answer 46

Left

Question 47

Non-metals are found on the _____ side of the periodic table

Answer 47

Right

Question 48

Electrons are exchanged between atoms

Answer 48

Tru

Question 49

Covalent compounds are made of: ________ and __________

Answer 49

Non-metal and non-metal

Question 50

In Covalent compounds, electrons are __________

Answer 50

Shared

Question 51

Lewis dot structures only deal with:

Answer 51

Valence electrons.

When drawing the dots start from east, then north west south.

Question 52

In a Bohr diagram, you show the _________ in all of the _______

Answer 52

Electrons in all of the shells

Question 53

In a Lewis diagram, you are only showing the _______________

Answer 53

Valence electrons