Triple Chemistry

Give me the ions made up of group atoms

Ammonium - NH₄⁺

Hydroxide - OH^-

Nitrate - NO₃^-

Carbonate - CO₃^2-

Sulphate - SO₄^2-

Who created the first periodic table

Dmitri Mendeleev

What are ions?

They are atoms which have lost or gained electrons giving it either a positive or negative charge.

What are properties of ionic compounds?

Ionic compounds have high melting points because of the strong electrostatic forces of attraction.

When they are solid they don’t conduct but when they are liquid they do.

What are properties of covalent compounds?

They are held by strong covalent bonds but they have intermolecular bonds so it is easy to melt and boil. They bigger the atom the stronger the intermolecular bonds and the higher the melting point. They don’t conduct electricity.

Name the giant covalent structures

(Buckminster) Fullerene / C₆₀

Diamond

Graphite

Graphene

What is metallic bonding?

They are a lattice of cations in a sea of delocalised electrons. They have strong electrostatic forces of attraction.

Metal properties

They have high melting points, they are malleable and good conductors of heat and electrons.

What is Avogadro’s constant

6.02×10²³

Equation for finding moles

n = m/M_r

Equation for concentration

c = m/v

What is a limiting reagen