Topic 1 - Atoms, Elements and Compounds Flashcards Preview

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Flashcards in Topic 1 - Atoms, Elements and Compounds Deck (13):
1

What is an atom?

The smallest part of a chemical element that can exist.

2

What is the relative mass of each particle?

Proton - 1. Neutron - 1. Electron - 0 (or very small)

3

What is the charge of each particle?

Proton : +1. Neutron : 0. Electron : -1

4

What is an element?

A substance made up of atoms with the same number of protons.

5

What is an isotope?

A different form of an element - it has a different number of neutrons

6

Balance this equation. Mg + O2 --> MgO

2Mg + O2 --> 2MgO

7

What is a compound?

Substances formed from two or more elements.

8

Give the formula for the following compounds:
Carbon Dioxide, Sodium chloride, Hydrochloric acid, Ammonia and Surfuric acid.

CO2, NaCl, HCl, NH3 and H2SO4

9

What is the atomic mass number?

The amount of neutrons and protons in the nucleus of the atom.

10

What is an ion?

A charged particle that is formed when an atom, or group of atoms, loses or gains electrons.

11

What is the only way to separate a compound?

Via a chemical reaction.

12

What are the half equations for the electrolysis of sodium chloride?

Cathode - 2H+ + 2e- --> H2
Anode - 2Cl- --> Cl2 + 2e-

13

Write the ionic equation for the electrolysis of Sodium chloride

2H+ + 2Cl- --> H2 + Cl2