NEW
Font size
S
M
L
XL
WorksheetsF3-Chem-Ch5-Atomic structure01
Total questions: 10
Worksheet time: 10mins
Name
Class
Date
1.
Which of the following sets of elements are correctly arranged in ascending order of their atomic numbers?
a)
hydrogen, boron, helium, fluorine
b)
fluorine, helium, hydrogen, helium
c)
hydrogen, helium, boron, fluorine
d)
fluorine, boron, helium, hydrogen
2.
Which of the following sets of elements are correctly arranged in descending order of their atomic numbers?
a)
sodium, aluminium, phosphorus, chlorine
b)
chlorine, phosphorus, aluminium, sodium
c)
sodium, chlorine, phosphorus, aluminium
d)
chlorine, sodium, phosphorus, aluminium
3.
Which of the following sets of atomic symbols is really correct?
a)
K, P, Ca, Ar
b)
A, P, K, Ca
c)
Bo, C, Ph, Ar
d)
Ar, P, K, Ma
4.
Which of the following sets of elements is a correct list of metal elements?
a)
helium, magnesium, calcium
b)
sodium, magnesium, phosphorus
c)
potassium, sodium, hydrogen
d)
potassium, sodium, lithium
5.
Atom X has 47 protons and 61 neutrons. What is its atomic number and mass number respectively?
a)
47, 61
b)
61, 47
c)
108, 47
d)
47, 108
6.
Atom Y has a mass number of 81 and has 35 electrons. What is its number of protons and neutrons respectively?
a)
35, 81
b)
35, 46
c)
81, 35
d)
46, 35
7.
Which of the following pair of elements are gases at room temperature?
a)
helium and argon
b)
fluorine and bromine
c)
mercury and helium
d)
argon and bromine
8.
Which of the following statements about an atom are correct?
(1) An atom is mostly empty space.
(2) Electrons are found outside the nucleus in an atom.
(3) All atoms contain protons, neutrons and electrons.
a)
(1) and (2) only
b)
(1) and (3) only
c)
(2) and (3) only
d)
(1), (2) and (3)
9.
From the full atomic symbol of unknown atom Z,
45103 Z
which of the following statements is correct?
a)
Z has 45 neutrons in the nucleus.
b)
Z has 45 protons moving around its nucleus.
c)
Z is electrically neutral.
d)
There are 58 protons found in its nucleus.
10.
Which of the following statements about aluminium atom and silicon atom is correct?
a)
Their symbols are Al and S respectively.
b)
They have the same number neutrons in the nucleus.
c)
Silicon atom has two more electrons than aluminium atom.
d)
Aluminium atom is electrically neutral but silicon atom is not.
Reset
