WorksheetsAssessment
Total questions: 6
Worksheet time: 6mins
Name
Class
Date
1.
which of these elements higher in energy and why ?
Mg 1224 Fe 5526
4 lines
2.
The number of protons plus neutrons ?
a)
mass weight
b)
Mass number
c)
atomic number
d)
atomic weight
3.
The atomic number of an element having 6 protons in its nucleus is
a)
13
b)
6
c)
3
d)
12
4.
The nucleus contains
a)
Atom
b)
Charges
c)
Atomic number
d)
Neutrons +proton
e)
Electron
5.
A substance that can be observed without changing in matter
a)
molecule
b)
chemical property
c)
physical property
6.
Why can`t extinguished petroleum fires with water? Explain
4 lines
100 %
