Materials
Atoms
Ions
Bonding
Chemical Reactions
100

What are the three major groups on the periodic table?

Metals, Non-metals, and Metalloids

100

The number of protons in an atom is called...?

The Atomic Number.

100

An ionic bond is formed by...

The attraction of oppositely charged ions.

100

What is covalent bonding?

A chemical bond that involves the sharing of electrons to form electron pairs between neighbouring atoms.

100

Why is mass conserved in chemical reactions?

Because the new substances created are composed of atoms that were present in the reactants.

200

I am lustrous, malleable, and ductile. What am I?

A metal

200

If a substance is made up of different types of atoms, then it is known as...

A compound

200

How are ions formed? Why does this happen?

Ions are formed when atoms lose or gain electrons in order to have full outer valence electron shells.

200

Substance composed of metals only = ? Substance composed of metals and non-metals =? Substance composed only of non-metals =?

Metals = metallic bonding. Metals and non-metals = ionic bonding. Non-metals = covalent bonding.

200

What are the products of an Acid and Metal Oxide chemical reaction?

Salt + Water

300

What are three properties of non-metals?

Poor conductors of heat and electricity, low belting and boiling point, brittle, and dull.

300

The number of Protons + Neutrons in an atom is called the...

Mass Number

300

Differentiate 'Cations' and 'Anions'. What are the charges?

Cations = ion molecule that has fewer electrons than protons as is positively charged. Anions = ion that has more electrons than protons and is negatively charged.

300

State the type of bonding that would exist in the following substance: P2O5

Covalent

300

Acid + Base reactions can also be called ... reactions? Why so?

Neutralisation Reactions. As they aim to bring the pH of a substance towards 7 (neutral).

400

What does semi-conductive mean? What material is semi-conductive?

Semi-conductive means the material can conduct electricity under certain conditions. Example is Metalloids.

400

42He: What does the 4 represent? What does the 2 represent? What does 'He' represent?

4 = mass number, 2 = atomic number, He = chemical symbol

400

What is a polyatomic ion?

Combination of several atoms to form an ion.
400

State the number of electrons that the element has gained or lost in forming the following ion: N3-

Gained 3

400

Hydrochloric acid + potassium hydroxide -> ??

Potassium Chloride + Water

500
What is the difference between pure metals and alloys?

Pure metals are made of one type of atom. An alloy is a metal combined with small amounts of other elements.

500

Sodium Molecule: The mass number = 23, the atomic number = 11. How many electrons there are in the nucleus? Explain your working.

Neutrons = Mass Number - Atomic Number. Therefore: Neutron No. = 23 - 11. Number of neutrons in the nucleus = 12.

500

What is the chemical formula for ammonium?

NH4+

500

What is the name of this ion? HSO4-

Hydrogen Sulfate

500

Calcium Carbonate + Nitric Acid -> ??

Calcium Nitrate + Water + Carbon Dioxide

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