WorksheetsScience KSSM Chapter 8 Elements and Substance
Total questions: 21
Worksheet time: 17mins
What are molecules?
Molecules are combinations of two or more atoms.
Molecules are the parts that make up atoms
Molecules are the gaseous parts of atoms
Molecules are atoms that have a positive charge
What is the atomic mass of the element?
6
Carbon
12
7
How many neutrons does an Aluminum atom have?
13
14
26
27
The element in the diagram is neutral because...
Number of proton same as number of neutron
Number of electron same as number of proton
Number of electron same as number of neutron
Number of proton same as nucleon number
What are the characteristic for elements in the same group of the Perodic Table?
Same valence electron
Same proton number
Same physical properties
Same nucleon number
Which of the following is not the property of the elements across a period from left to right?
The conductivity of electricity decreases.
The elements change from gases to solids.
The proton number of the elements increase.
The elements change from metals to non-metals
The elements placed in the Modern Periodic Table of elements are arranged in the sequence of
decreasing boiling point
decreasing atomic mass
increasing number of protons
Increasing number of neutrons
The following information shows the properties of an element T.
- Placed at Group 18
- Non-reactive
Element T could be
neon
iodine
hydrogen
aluminium
Which of the following is true based on the symbol above?
proton number is 11, electron number is 11 and neutron number is 12
proton number is 11, electron number is 11 and neutron number is 23
proton number is 12, electron number is 12 and neutron number is 23
proton number is 23, electron number is 12 and neutron number is 11
In the Modern Periodic Table of Elements, N is located below M in a group. if the proton number of atom M is 8, what is the electron arrangement of atom N?
2.6
2.7
2.8.6
2.8.7
The isotopes of uranium element have different
nucleon number
number of protons
number of electrons
chemical properties
Which of the following is not a radioisotopes?
Carbon-12
Phosphorus-32
Cobalt-60
Iodine-131
This chemical formula is called an
atom
element
compound
substance
Magnesium has a chemical symbol of (Mg) is listed as a
element
compound
solution
atom
sodium chloride (salt) is example of ...
atomic substance
molecular substance
ionic substance
alloy
The element in the diagram is neutral because...
Number of proton same as number of neutron
Number of electron same as number of proton
Number of electron same as number of neutron
Number of proton same as nucleon number
3. Which of the following is an atomic substance?
11. Diagram shows the electron arrangement of oxygen atoms.
Which of the following statements is correct about this atom?
Number of protons is 2
Nucleon number is 4
Number of valence electrons is 6
Number of neutrons is 6
15. Which of the following is the use of Cobalt-60?
To make pest infertile
Determine the thickness of paper
Estimate the age of archaeological specimens
Destroy cancer cells
