Worksheets8.5AB Atoms CFU
Total questions: 12
Worksheet time: 6mins
1. Which of the following best describes a neutron?
It has no mass and is found in the nucleus of an atom
It has an electrical charge of zero and a mass of 1 amu
It is found in the nucleus of an atom and has a positive charge.
It has no charge and almost no mass when compared to a proton.
Which particles would you find in the nucleus of an atom?
Protons and neutrons
Electrons and Protons
Electrons only
Neutrons and electrons
What is the charge of an atom that contains 11 protons, 12 neutrons, and 11 electrons?
+1
-1
0
+23
When compared to a proton, an electron –
has the same electrical charge.
has a greater mass.
is located closer to the nucleus.
has almost no mass.
An atom is shown in the diagram below. Which of the following correctly describe one of the subatomic particles that could be found at location X?
It has no charge and no mass.
It has a positive charge a mass of 1 amu.
It has a negative charge and almost no mass.
It has a neutral charge and twice the mass of a proton.
What is the mass of an atom with seven protons, seven neutrons, and eight electrons?
7amu
8amu
14amu
15amu
Which of the following is always different between atoms of different elements?
Number of valence electrons
Number of protons in the nucleus
Charge of the atom
Phase at room temperature
Which of the following characteristics of an atom determines how that element will react with other elements chemically?
Number of electrons in the outermost energy level
Number of protons in the nucleus
Charge of neutrons in the nucleus
Movement of electrons in the electron cloud
A neutral atom is shown in the diagram below. How would the identity of this atom change if it gained two protons?
It would become Boron (B)
It would become Nitrogen (N)
It would have a net charge of -2
It would have an atomic mass of 9 amu.
The table below provides information on four different elements. Based on the information provided, it can be concluded that –
A. sodium is the best conductor.
B. bromine is the most reactive.
C. phosphorus is the fewest protons.
D. strontium has the smallest mass.
Which of the following properties of Lithium (Li) distinguishes it from all other elements?
Lithium has three protons in its nucleus
Lithium is a gray solid at room temperature
Lithium forms compounds with oxygen.
Lithium can be found in Earth’s crust.
Which of the following explains why Fluorine (F) and Chlorine (Cl) have similar reactivity?
They contain the same number of protons and neutrons in the nucleus.
They have a positive net charge.
They contain the same number of valence electrons.
They are both classified as metals.
