WorksheetsAtoms, Ions and Isotopes
Total questions: 15
Worksheet time: 30mins
What do these 3 pictures represent? (Choose 2 correct answers)
ions
isotopes
neutral atoms
compounds
If a neutral atom gains more electrons, it will become a(n)
Positive ion
Negative ion
Isotope
New element
If a neutral atom loses electrons, it will become a(n)
Positive ion
Negative ion
Isotope
New element
Isotopes are atoms that have different...
(choose 2 correct answers)
Mass numbers
numbers of Protons
Atomic Numbers
numbers of Neutrons
element names
What is the atomic number of the atom shown in this model?
11
12
23
Is this a neutral atom, or an ion?
A neutral atom, because the protons = electrons
A neutral atom, because the protons = neutrons
An ion, because there are no electrons in the nucleus
(Use your PT) How many neutrons would be in the most common isotope of Beryllium, Be?
5
4
9
Which particles are found in the nucleus of an atom?
protons and electrons
protons and neutrons
neutrons and electrons
protons and electrons
How do you calculate the charge of an atom?
protons + electrons
protons - electrons
protons + neutrons
mass number - protons
How do you calculate the mass number of an atom?
protons - electrons
protons + neutrons
mass number - protons
An atom of Phosphorus has 15 electrons and 16 neutrons. What is its mass number?
15
16
31
30
A charged atom formed by loss or gain of electrons
electrons
protons
neutrons
ions
nuclides
According to the information in the nuclide symbol, this magnesium atom must have ____ electrons.
12
2
10
24
14
A neutral atom has 8 electrons and 7 neutrons , so its atomic number is ____ and its mass number is ____
8, 7
7, 15
8, 15
15, 7
8, 1
What is the relative charge of a neutron?
+1
-1
0
