WorksheetsAtoms. Ions and isotopes
Total questions: 30
Worksheet time: 24mins
What is the meaning of atomic number?
proton number
electron number
The fluorine atom has an atomic number of
19
9
What is the mass number and atomic number ?
Mass number = 7, atomic number = 14
Mass number = 14, atomic number = 7
How many neutrons are there in one atom of magnesium?
12
6
24
ALL atoms of the same element have:
same number of proton
same number of nucleon
different number of neutron
different number of electron
An element has the mass number 12 and atomic number 6. The number of neutrons in it is:
6
10
4
8
Isotopes have different numbers of
protons
neutrons
electron
properties
If an atom has 10 electrons, how many protons does it have?
0
1
10
5
If an atom has 9 protons and 10 electrons it has a charge of ____.
0
-1
+1
-2
To figure out the mass of an atom based on its subatomic particles you would add ______ & ________.
Protons & Electrons
Protons & Neutrons
Neutron & Electrons
What particles determine the mass number?
Protons and electrons
Electrons and neutrons
Protons and neutrons
Protons, neutrons, and electrons
What is the mass number of bromine?
35
45
80
79.904
What is the charge on a lithium atom that loses 1 electron?
+1
0
-1
-2
What is a cation's charge?
positive
negative
neutral
depends on the element
The positive particles of an atom are
electrons
positrons
neutrons
protons
The central region of an atom where its neutrons and protons are is its
nucleus
electron cloud
core
center
Particles in an atom that are neutral and have no charge are
negatrons
electrons
neutrons
protons
