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WorksheetsAtom ICGSE Unit Test
Total questions: 30
Worksheet time: 23mins
What is the smallest unit of matter? It is composed of protons and neutrons, held together in the nucleus, and electrons around the nucleus in different electron orbitals, which form an electron cloud.
cell
nucleus
atom
electron
What is a subatomic particle with a positive charge that is in the nucleus of an atom?
neutron
proton
electron
valence electron
What is a subatomic particle with a negative charge? It is found in the electron cloud surrounding the nucleus.
neutron
proton
electron
electron cloud
What is one way Neutrons are different from electrons?
they both are negative
neutrons have no charge, while electrons have a negative charge
Both are in the nucleus( center of atom)
Electrons are inside nucleus and neutrons are outside the nucleus.
Which part of the diagram represents the proton?
a
b
c
d
The Atomic number is known as the _______
Number of electrons in an atom
Number of Protons in an atom
Number of neutrons in an atom
Number of Protons and electrons in an atom
What is Atomic Mass Number ?
Number of Protons
Number of Neutrons
Number of Protons and Neutrons
Number of Protons and Electrons
What is the Atomic Mass Number of the element mentioned above
12
6
C
16
What is the number of protons in Magnesium atom ?
12
24
23
8
What is the number of electrons in chlorine atom ?
35
11
18
17
How many Neutrons are present in the Sodium atom ?
12
11
0
23
Atoms of the same element which have a different number of neutrons are called _________________.
ions
isotopes
quarks
molecules
Which two are isotopes of one another?
Atoms 2 & 3
Atoms 1 & 2
Atoms 2 & 4
Atoms 1 & 4
which picture show the discovery of Bohr atomic theory
Haw many maximum electrons can be present in the "M" shell of an atom?
2
8
18
32
How many energy shells/levels does this atom have?
1
2
3
4
The electronic configuration of 17Cl is
2,8,8,1
2,8,6
2,8,8
2,8,7
Which of the following is the electronic Configuration of Sodium 11Na
2,8
2,8,1
2,1,8
8,1,2
The vertical (up and down) columns in the Periodic Table are called
groups
towers
periods
atomic numbers
alkali metals are kept in ........
IIA
IIIA
IA
0
The atomic number of element Q is 9 and its mass number is 19. In which group of the periodic table should be placed?
0
I
II
VIII
In which period this atom?
1
2
3
4
In which period and group this atom?
period 1, group VI A
Period 3, group VIIA
Period 3, group IA
Period 2, group IIA
