WorksheetsIons, Valence, and Bohr Models
Total questions: 20
Worksheet time: 15mins
What ion is formed by rubidium when it is chemically stable?
Rb+
Rb+2
Rb-
Rb-2
What ion is formed by oxygen when it is chemically stable?
O+
O+2
O-
O-2
Copper can form charges of +1, +2, +3, and +4. What is the charge of copper(III)?
+1
+2
+3
+4
What is the total number of electrons in an N-3 ion?
4
7
8
10
Which of the following ions has more electrons than protons?
Be2+
K1+
S2-
C4+
Which ion is formed when an atom loses 3 electrons?
3+
3-
2+
2-
How many valence electrons does a neutral atom of phosphorus have?
2
3
4
5
Which element produces a yellow/orange flame in a flame test?
Lithium chloride
Potassium iodide
Barium sulfide
Sodium chloride
What would be the color of the flame produced by copper sulfate in a flame test?
red
pink-lilac
green
yellow
Which of the following elements has 2 valence electrons in its neutral atom?
Oxygen
Aluminum
Calcium
Selenium
If an atom has 3 electron shells, which element could it be from the options below?
Oxygen
Aluminum
Selenium
Lithium
Is a sulfur ion a cation or an anion?
Anion
Cation
Neutral atom
Isotope
Which of the following best describes a cation?
An atom that has lost electrons and has a positive charge
An atom that has gained electrons and has a negative charge
An atom with a full outer shell
An atom with no charge
Why are noble gases naturally stable?
Because they have a full outer electron shell.
Because they have the highest atomic mass.
Because they are metals.
Because they have no neutrons.
The innermost energy level has a maximum of how many electrons?
1
2
6
8
What group does this element belong to?
1
2
17
18
Which Bohr model represents Neon?
