Chemistry Lessons 1-4

Question 1

A part of an atom.

Answer 1

Subatomic Particle

Question 2

Who are the main scientists responsible for understanding subatomic particles?

Answer 2

Thompson, Rutherford, Bohr, Moseley, & Chadwick

Question 3

A circular orbit which an electron travels in.

Answer 3

Energy level

Question 4

Mass of a proton (& a neutron).

Answer 4

1 AMU (u)

Question 5

Mass of an electron

Answer 5

1/2000 AMU

Question 6

An atom is comprised of what?

Answer 6

A dense nucleus surrounded by electrons moving in space.

Question 7

How many electrons can occupy each of the three first electron levels?

Answer 7

First level - 2
Second level - 8
Third level - 8

Question 8

The atomic number is determined by what?

Answer 8

The number of protons.

Question 9

The number of electrons in a neutral atom is equal to what?

Answer 9

The atomic number.

Question 10

Sum of an atom’s protons & neutrons.

Answer 10

Atomic mass

Question 11

A repetition of the properties of elements.

Answer 11

Periodicity

Question 12

Periodic Law

Answer 12

The properties of elements are a periodic function of their atomic numbers.

Question 13

A column in the periodic table.

Answer 13

Group

Question 14

What are the periodic table families?

Answer 14

Alkali metals, alkaline-earth metals, chalcogens, halogens, & noble gases

Question 15

The outermost electron orbit

Answer 15

Valence Shell

Question 16

A row in the periodic table.

Answer 16

Period

Question 17

Alkali Metals

Answer 17

-Group 1A
-Soft, highly reactive
-Always combined with other elements in nature

Question 18

Chalcogens

Answer 18

-Group 6A
-Less reactive than halogens

Question 19

Halogens

Answer 19

-Group 17A
-Poisonous & very reactive

Question 20

Noble Gas

Answer 20

-Group 8A
-Very stable non-metals
-No natural compounds exist with them

Question 20

Alkaline-Earth Metals

Answer 20

-Group 2A
-Less reactive than alkali metals

Question 21

Transition Metals

Answer 21

-Found in short columns

Question 22

Metalloids

Answer 22

-Behave like metals & non-metals
-On the staircase

Question 22

Non-Metals

Answer 22

-Found on the right of the staircase
-More than or equal to 5 valence electrons
-Low melt temp, usually gas or fragile solids at room temperature

Question 22

A group of elements with a specific name.

Answer 22

Family

Question 23

A kind of glue which holds atoms together to form molecules.

Answer 23

Bond

Question 24

A charged particle resulting from an atom gaining or losing an electron.

Answer 24

Ion

Question 25

A bond between a positively charged & negatively charged ion.

Answer 25

Ionic Bond

Question 26

A compound formed from two ions held together by an ionic bond.

Answer 26

Ionic Compound