Font size
WorksheetsChem Quiz 01
Total questions: 25
Worksheet time: 30mins
Which subatomic particle has a positive (+) charge?
(a)
Which subatomic particles have same mass?
(a)
Which subatomic particle has a neutral or no charge?
(a)
How many electron shells/levels does this atom have?
(a)
Describe the atomic structure of this atom [4 marks]
Subatomic particles with a negative charge
Electrons
Neutrons
Protons
Quarks
How many molecules are in 2.5 mol of NaCl?
1.5 x 1024 molecules
1.5 molecules
4.15 molecules
1.5 x 1023 molecules
Define empirical formula [1 mark]
An empirical formula:
is the simplest whole-number ratio of moles of elements in the compound,
is a formula that calculates the coefficients of a compound in a balanced equation.
What do these isotopes of carbon all have in common?
In a correctly written symbol what would be located in the "A" position?
What is an isotope?
How are covalent bonds formed?
Why do elements bond?
All but Hydrogen and Helium want how many valence electrons?
1
2
8
0
What is the physical properties of covalent compound? [4 marks]
Sugar has low melting point than salt. Explain why [2 marks]
An atom Q has 11 protons. What is the number of electron for ion Q?
(a)
