2.1 Atoms, Elements And Compounds

Question 1

What is matter

Answer 1

Any substance that has mass and occupies volume

Question 2

What can we classify matter into

Answer 2

Pure substances-element/compound
Mixture-homogenous/hetrogenous

Question 3

What is a pure substance

Answer 3

All the particles within the substance are the same

Question 4

What is an element

Answer 4

Substance made from only one type of atom(all containing the same protons)

Question 5

What is a compound

Answer 5

Substance made from different types of elements chemically bound together

Question 6

What is a mixture

Answer 6

Physical combo of 2+ substances that can be separated by physical means

Question 7

What is a homogenous mixture

Answer 7

A mixture of substances in the same phase-cannot distinguish between the layers.

Question 8

What is a heterogeneous mixture

Answer 8

A mixture of substances in different phases-easily distinguishable between layers.

Question 9

What is an ion

Answer 9

Atom or group of atoms that has gained or lost electrons

Question 10

What determines the mass of an atom

Answer 10

The nucleons

Question 11

Define the term isotope

Answer 11

Atoms of the same element with the same number of protons but a different number of neutrons

Question 12

Difference between elements compounds and mixtures

Answer 12

Elements are the simplest substance that cannot be broken down further using chemical methods, compounds are 2 or more elements chemically bonded and mixtures are 2+ substances chemically combined together