WorksheetsElectrons
Total questions: 15
Worksheet time: 15mins
How many electrons does a neutral oxygen atom have?
8
16
2
15
Which of the following neutral elements has 35 electrons?
Arsenic
Sulfur
Bromine
neutral
balanced
When an atom loses an electron, it becomes a(n)
cation
anion
neutral ion
neutral atom
A neutral atom of the element sodium has ____ electrons.
22
23
8
11
Do electrons contribute to the atomic mass of an atom?
YES, they contribute the same as the protons
NO, they are not part of an atom.
No, their mass is too small to count toward the mass of an atom
YES, they contribute the same as the protons and neutrons
Which description about the electron is accurate?
Negatively charged particle with a mass of 0 amu
A neutrally charged particle with a mass of 0 amu
What is the role of a electron in an atom?
Electrons live inside the nucleus and carry a neutral charge.
Electrons circle the nucleus and have a positive charge.
Electrons circle the nucleus and have a negative charge.
Electrons live inside the nucleus and have a positive charge.
What ion has 9 protons and 10 electrons?
K+1
F-1
F+1
Ne-1
What ion has 38 protons and 37 electrons?
Sr+1
Rb+1
Sr-1
Rb-1
How many electrons does a Mg+2 ion have?
12
14
10
24
Which of the following is an Anion?
an atom with 9 protons and 9 electrons
an ion with 11 protons and 10 electrons
an ion with 29 protons and 27 electrons
an ion with 8 protons and 10 electrons
Which of the following ions have the same number of electrons?
F-1 and Cl-1
Li+1 and K+1
Zn+1 and Cu+2
Cs+1 and Ba+2
