Atomic Structure
Electrons and Ions
Chemical Compounds
Chemical Equations
Analytical Techniques
100
The three particles which make up an atom are:
Protons, Neutrons and Electrons
100
For an atom to become an ion, it can ______ or lose electrons.
Gain
100
Compounds formed when electrons are shared are called ...
Covalent
100
How many oxygen are present
2 ZnNO3
6
100
The study of the electromagnetic radiation absorbed or emitted by the atoms is known as___________.
- electromagnetic radiation
- atomic spectroscopy.
- radiation
- none of the above.
Answer – b. atomic Spectroscopy.
200
Which particles within an atom add together to give the mass of an atom?
Protons & Neutrons
200
An atom has an electron configuration of 1s2, 2s2 2p4. This would be an atom of...
oxygen
200
Complete this word reaction:
Magnesium + Oxygen ----->
Magnesium Oxide
200
How many Hydrogen are present?
2H2O + H2SO4
6
200
1. Which of the following is the principle of Atomic Absorption Spectroscopy?
a) Radiation is absorbed by non-excited atoms in vapour state and are excited to higher states
b) Medium absorbs radiation and transmitted radiation is measured
c) Colour is measured
d) Colour is simply observed ?
Answer: a) Explanation: Atoms in gaseous state absorb the radiation and are excited to a higher state. Since the higher state is unstable the atom returns the groundstate with the emission of radiation which is measured
300
The atomic number is determined by the number of ...
protons
300
What would be the electron configuration (in spdf format) for an atom of Aluminium?
1s2, 2s2, 2p6, 3s2, 3p1
300
Name the following compound:
NO2
Nitrogen Dioxide
300
Balance this Equation
NaOH + H2SO4 -> Na2SO4 + H2O
2 NaOH + H2SO4 -> Na2SO4 + 2 H2O
300
Draw and label a diagram of a mass spectrometer
400
Forms of an element where the atoms have a different number of neutrons are called...
Isotopes
400
What would an atom in Group 7 do to form a stable configuration?
Gain one electron
400
Give the chemical formula of Potassium Sulfate
K2SO4
400
Is this Balanced?
2 KMnO4 + 16 HCl ->2 KCl + 2 MnCl2 + 8 H2O + 5 Cl2
Yes
400
The mass spectrum of strontium contains the following
amu % abundance
84 0.56
86 9.86
87 7.00
88 82.58
Calculate the relative atomic mass of strontium.
87.7 amu
500
Name this element
Beryllium
500
What is the electron configuration (in spdf) of an Oxygen Ion (O2-)
1s2, 2s2, 2p6
500
Give the chemical formula of Aluminium Hydroxide
Al(OH)3
500
Balance this Equation
Fe + Cl2 = FeCl3
2 Fe + 3 Cl2 = 2 FeCl3