Element, Compound, and Mixture

Question 1

Physical Change is…

Answer 1

A change of matter in size, shape, or state without any change in identity is called a physical change

Question 2

Physical Change:

New Substance is = formed/not formed

These changes are = easily reversible/irreversible

Answer 2

1. Not Formed
2. Easily Reversible

Question 3

Chemical Change is…

Answer 3

A change of matter that occurs when atoms link together in a new way, creating a new substance different from the original substance

Question 4

Chemical Change:

New Substance is = formed/not formed

These changes are = easily reversible/irreversible

Answer 4

1. Formed
2. Irreversible

Question 5

Definition of Element…

Answer 5

An element is a pure substance which cannot be split up into two or more simpler substances by chemical means

• Consists of only one atom
• Cannot be broken down into a simpler type of matter by either physical or chemical means
• Can exist as either atoms (e.g. argon) or
  molecules (e.g., nitrogen).
• Cannot possible to obtain a simpler substance chemically from these elements.
• Can only make more complicated substances from it.

Question 6

Elements can be classified into two groups which are…

Answer 6

Atoms and Molecules

Question 7

Atoms = 1 atom of same element/made up of 2 or more atom from the same element that are chemically bonded together

Molecules = 1 atom of same element/made up of 2 or more atom from the same element that are chemically bonded together

Answer 7

1. 1 atom of same element
2. Made up of 2 or more atom from the same element that are chemically bonded together

Question 8

An element is made up of…

Answer 8

Tiny particles called atoms, The atoms of an element is different from that of another element

Question 9

Molecules consisting of a
few atoms are called…

What type of molecule is Hydrogen (H2)…

What type of molecule is Hydrogen Ozone (O3)…

Answer 9

1. Polyatomic molecules
2. Diatomic Molecule
3. Triatomic Molecule

Question 10

continue later