Atomic Number and Mass Number (Basic Concept)

Assessment

Atomic Number and Mass Number (Basic Concept)

ninja coder

Chemistry

Grade9

10 Plays

100 Participants

Worksheet

13 Qs

1.
Multiple Choice
1 pts•30 s
Electron carries which type of charge?
Answer choices
Positive
Neutral
Negative
Both positive and negative
2.
Multiple Choice
1 pts•30 s
Protons are found in which part of the atom?
Answer choices
Electron cloud
Shell
Nucleus
Outside the atom
3.
Multiple Choice
1 pts•30 s
What is the charge on a neutron?
Answer choices
Positive
Negative
Neutral
Variable
4.
Multiple Choice
1 pts•30 s
Which particle determines the atomic number of an element?
Answer choices
Electron
Neutron
Proton
Mass number
5.
Multiple Choice
1 pts•30 s
Total number of protons and neutrons gives the:
Answer choices
Atomic number
Mass number
Electron number
Ion number
6.
Multiple Choice
1 pts•30 s
Electrons revolve around the nucleus in:
Answer choices
Fixed orbits
Random paths
Outside the atom
In the nucleus
7.
Multiple Choice
1 pts•30 s
The nucleus of an atom consists of:
Answer choices
Protons and electrons
Electrons and neutrons
Protons and neutrons
Only protons
8.
Multiple Choice
1 pts•30 s
Which particle has the least mass among proton, neutron, and electron?
Answer choices
Proton
Neutron
Electron
All have equal mass
9.
Multiple Choice
1 pts•30 s
In a neutral atom, the number of electrons is equal to the number of:
Answer choices
Protons
Neutrons
Isotopes
Ions
10.
Multiple Choice
1 pts•30 s
Rutherford’s experiment led to the discovery of:
Answer choices
Electron cloud
Atomic mass
Atomic nucleus
Neutrons
11.
Multiple Choice
1 pts•30 s
What is the atomic number of an element with 8 protons?
Answer choices
6
7
8
9
12.
Multiple Choice
1 pts•30 s
Which of the following represents a correct relation?
Answer choices
Atomic number = Protons + Neutrons
Mass number = Protons + Neutrons
Atomic number = Electrons + Neutrons
Mass number = Electrons + Neutrons
13.
Multiple Choice
1 pts•30 s
If the atomic number is 11 and the mass number is 23, how many neutrons are present?
Answer choices
11
12
23
34