2.1 - Atoms, compounds, molecules and equations Flashcards
Define the term ‘Isotope’ ?
Isotope - An atom with the same number of protons and electrons but a different number of neutrons
Define the term ‘ion’ ?
Ion - An atom with the same number of protons but a different number of electrons
What subatomic particles are atoms made up of ?
Protons, electrons and neutrons
What is the relative charge and relative mass of protons, electrons and neutrons ?
What does A,Z and X represent in this Isotope notation ?
- A = Mass number
- Z = Atomic number
- X = Element of isotope
Define the term ‘relative atomic mass’ ?
Relative atomic mass - The weighted mean mass of an atom of an element compared with 1/12 of the mass of an atom of carbon-12
Define the term ‘Relative formula mass’ ?
Relative formula mass - The weighted mean mass of the formula unit of a compound compared with 1/12 of the mass of a carbon-12 atom
Define the term ‘Relative molecular mass’ ?
Relative molecular mass - The weighted mean mass of a molecule of a compound compared with 1/12 of the mass of an atom of carbon-12
Define the term ‘Relative isotopic mass’ ?
Relative isotopic mass - The mass of an atom of an isotope compared with 1/12 of a the mass of a carbon-12 atom
What are the uses of mass spectrometry?
- To determine the relative masses of isotopes
- To determine the relative abundance of isotopes
What is the equation to calculate the relative atomic mass ?
Relative atomic mass = ( Isotope mass x abundance ) + ( Isotope mass x abundance ) / sum of abundance
What is the equation to calculate the relative isotopic abundance ?
Relative atomic mass = ( Isotope mass x [ y ] ) + ( Isotope mass x [ sum of abundance - y ] ) / sum of abundance
Do you know how to do calculations to work out the relative atomic mass and relative isotopic abundance ?
Yes
Write the formula of a nitrate ion ?
NOv3-
Write the formula of a carbonate ion ?
CO₃²⁻
Write the formula of a sulphate ions ?
SO₄²-
Write the formula of a hydroxide ion ?
OH-
Write the formula of an ammonium ion ?
NHv4+
Write the formula of a zinc ion ?
Zn2+
Write the formula of a silver ion ?
Ag+
What is the following ion called : Ag+ ?
A silver ion
What is the following ion called : Zn2+ ?
A zinc ion
What is the following ion called : OH- ?
A hydroxide ion
What is the following ion called : NHv4+ ?
An ammonium ion
What is the following ion called : SOv4 2- ?
A sulphate ion
What is the following ion called : COv3 ^2-
A carbonate ion
What is the following ion called : NOv3- ?
A nitrate ion
Do you know how to write the equations of ionic compounds ?
Yes
Do you know what group numbers correspond to what charge ions ?
Group 1 : X+
Group 2 : X2+
Group 3 : X3+
Group 5 : X3-
Group 6 : X2-
Group 7 : X-
What is the full version of the following reaction : Metal + acid ?
Metal + acid —> salt + hydrogen
What is the full version of the following reaction : metal + water ?
Metal + water —> metal hydroxide + hydrogen
What is the full version of the following reaction : Acid + Alkali ?
Acid + Alkali —> salt + water
What is the full version of the following reaction : Metal hydrogencarbonate + acid ?
Metal hydrogencarbonate + acid —> salt + water + carbon dioxide
Do you know how to balance equations ?
Yes