WorksheetsChemical
Total questions: 15
Worksheet time: 15mins
What is the Symbol of neon?
(a)
What is the Previous name of the tungsten?
Stronian
Argentum
Uranus
Wolfram
In which year did Jöns Jacob Berzelius use the English alphabet to represent the elements?
1947
1963
1813
1564
A material that is composed of only one type of particle is called _______
Molecules
Monatomic
Helium
Pure substance
What is the valency of carbon?
1
6
4
7
What are valence electrons?
sum of the protons and neutrons
protons minus electrons
electrons in the inner shells
electrons in the outer shell
A _______ is the force that holds atoms together in a compound.
Chemical Formula
Chemical Reaction
Chemical Bond
Synthesis Reaction
An atom with a different number of electrons than it should have (more or less) is called an ---
isotope
valence electron
ion
octet
Why do chemical bonds form?
so the number of protons equals the number of electrons
to fill the outermost electron level
so an atom can become unstable
According to the Octet Rule, atoms of elements react with each other in order to attain ____ electrons in their outermost energy level or shell.
2
4
8
10
An atom of Neon complies with the Octet Rule because it has ___ electrons in its outer shell.
10
8
2
7
Ionic bonds form between ---
nonmetals.
metals and nonmetals.
Which of the following is a chemical property?
Density
Boiling point
Reactivity with acid
Color
What is the chemical formula for table salt?
NaCl
KCl
CaCO3
MgSO4
Which of the following processes is a chemical change?
Melting of ice
Rusting of iron
Boiling of water
Breaking of glass
