Materials
What are the three major groups on the periodic table?
Metals, Non-metals, and Metalloids
The number of protons in an atom is called...?
The Atomic Number.
An ionic bond is formed by...
The attraction of oppositely charged ions.
What is covalent bonding?
A chemical bond that involves the sharing of electrons to form electron pairs between neighbouring atoms.
Why is mass conserved in chemical reactions?
Because the new substances created are composed of atoms that were present in the reactants.
I am lustrous, malleable, and ductile. What am I?
A metal
If a substance is made up of different types of atoms, then it is known as...
A compound
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.
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.
What are the products of an Acid and Metal Oxide chemical reaction?
Salt + Water
What are three properties of non-metals?
Poor conductors of heat and electricity, low belting and boiling point, brittle, and dull.
The number of Protons + Neutrons in an atom is called the...
Mass Number
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.
State the type of bonding that would exist in the following substance: P2O5
Covalent
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).
What does semi-conductive mean? What material is semi-conductive?
Semi-conductive means the material can conduct electricity under certain conditions. Example is Metalloids.
42He: What does the 4 represent? What does the 2 represent? What does 'He' represent?
4 = mass number, 2 = atomic number, He = chemical symbol
What is a polyatomic ion?
State the number of electrons that the element has gained or lost in forming the following ion: N3-
Gained 3
Hydrochloric acid + potassium hydroxide -> ??
Potassium Chloride + Water
Pure metals are made of one type of atom. An alloy is a metal combined with small amounts of other elements.
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.
What is the chemical formula for ammonium?
NH4+
What is the name of this ion? HSO4-
Hydrogen Sulfate
Calcium Carbonate + Nitric Acid -> ??
Calcium Nitrate + Water + Carbon Dioxide