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___________.

  1. electromagnetic radiation
  2. atomic spectroscopy.
  3. radiation
  4. 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

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