Basic Revision

Question 1

What is the nucleus of an atom?

Answer 1

The dense, positive region of the atom consisting of protons and neutrons

Question 2

Where are electrons found in an atom?

Answer 2

Electrons are found in energy levels surrounding the nucleus​

Question 3

What is Bohr’s Model used for?

Answer 3

It is a simple representation of an atom explaining the behavior of elements​

Question 4

What does a full outer shell signify in atomic structure?

Answer 4

It signifies lower energy and greater stability, known as the octet rule​

Question 5

Define atomic number

Answer 5

The number of protons in an element, determining its identity​

Question 6

Define mass number

Answer 6

The sum of protons and neutrons in the nucleus. Isotopes have different mass numbers

Question 7

What is Group 1 called, and what ion charge does it form?

Answer 7

Alkali metals; form a +1 charge​

Question 8

What are Noble Gases known for?

Answer 8

Having a full outer shell and being chemically stable​

Question 9

What determines the group and period numbers of an element?

Answer 9

Group: Number of valence electrons.
Period: Number of occupied shells

Question 10

What are cations and how are they formed?

Answer 10

Positive ions formed when atoms lose electrons

Question 11

What are anions and how are they formed?

Answer 11

Negative ions formed when atoms gain electrons​

Question 12

Define matter

Answer 12

Anything that takes up space and has mass

Question 13

List the three forms of matter

Answer 13

Solids, liquids, and gases​

Question 14

How can the forms of matter change?

Answer 14

Without altering the substance’s composition​

Question 15

Define elements

Answer 15

The purest form of matter that cannot be broken down into simpler substances​

Question 16

What is a compound?

Answer 16

Molecules made of more than one type of atom, chemically bonded in fixed proportions

Question 17

What distinguishes mixtures from pure substances?

Answer 17

Mixtures retain their identities and do not have a constant composition​

Question 18

What are the properties of metals regarding appearance and conductivity?

Answer 18

Metals are shiny and good conductors of heat and electricity​

Question 19

What are the properties of non-metals regarding state and density?

Answer 19

Non-metals can be solid, liquid, or gas and have low density​

Question 20

Compare the melting/boiling points of metals and non-metals

Answer 20

Metals have high melting/boiling points, while non-metals have low melting/boiling points

Question 21

Define malleability in metals.

Answer 21

The ability of metals to be shaped or hammered into thin sheets​