Topic 1 States Of Matter

Question 1

What is the smallest individual building block of elements?

Answer 1

Atom

Atomic symbols are used to represent more than 100 types of atom

Question 2

What is the term for a substance made up of atoms with the same atomic number?

Answer 2

Element

Examples include Fe (iron), O (oxygen), H (hydrogen)

Question 3

What is a compound?

Answer 3

Two or more different elements bonded together

Substances that present the same composition

Question 4

How can matter be classified?

Answer 4

According to its physical state and composition

Physical states include gas, liquid, solid; compositions include elements, compounds, mixtures

Question 5

What is an isotope?

Answer 5

Atoms with the same number of protons but different numbers of neutrons

Question 6

Define molecule.

Answer 6

A neutral entity consisting of two or more atoms held together by chemical bonds

Question 7

True or False: All compounds are molecules, but not all molecules are compounds.

Answer 7

True

Question 8

What is the formula for ammonia?

Answer 8

NH3

Question 9

What is the difference between atoms and ions?

Answer 9

Ions are electrically charged atoms that have lost or gained electrons

Question 10

Fill in the blank: A __________ is the smallest individual building block of compounds.

Answer 10

Molecule

Question 11

What is the mass number of an atom?

Answer 11

Number of protons plus number of neutrons

Question 12

What does the chemical formula of a compound indicate?

Answer 12

How many atoms of each element the molecule contains

Question 13

Name two types of chemistry.

Answer 13

• Inorganic
• Organic

Question 14

What is the atomic number of carbon?

Answer 14

6

Question 15

What happens to a compound when it goes into solution in water?

Answer 15

It breaks up into ions

Question 16

What is the chemical formula for water?

Answer 16

H2O

Question 17

What is the significance of valence electrons in chemical bonding?

Answer 17

They participate in the bonding of atoms

Question 18

What is the name of the first element in the periodic table?

Answer 18

Hydrogen

Question 19

What is the difference between a solid, liquid, and gas in terms of particle arrangement?

Answer 19

• Solid: Regular arrangement, fixed volume
• Liquid: Fixed volume, no definite shape
• Gas: Random arrangement, no fixed shape

Question 20

What is the formula for sodium chloride?

Answer 20

NaCl

Question 21

What does the term ‘Chemical Kinetics’ refer to?

Answer 21

The study of the rates of chemical reactions

Question 22

What is the purpose of quizzes in this course?

Answer 22

Formative assessment, no grades

Question 23

What is the significance of the atomic number?

Answer 23

It represents the number of protons in an atom

Question 24

What is the formula for sulfuric acid?

Answer 24

H2SO4

Question 25

Fill in the blank: The smallest unit quantity of an element is an ________.

Answer 25

Atom

Question 26

What is a practical report assessed on in this course?

Answer 26

Performance in laboratory classes and online quiz

Question 27

Identify two components of the final mark for the Chemistry in Action module.

Answer 27

• Coursework
• Exam