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1L - Chemistry Review Part 5
Test Description: Grade 9 locally developed science. Chemistry review: atoms
Instructions: Answer all questions to get your test result.
1) What is the charge of a proton?
A
positive
B
negative
C
neutral
2) What is the charge of a electron?
A
positive
B
neutral
C
negative
3) What is the charge of a neutron?
A
positive
B
neutral
C
negative
4) Which of the following particles orbit around the nucleus?
A
neutron
B
electron
C
proton
5) Which particles are inside the nucleus?
A
neutrons and electrons
B
protons and neutrons
C
electrons and protons
6) The order for filling orbits with electrons is
A
8, 8, 8
B
2, 4, 6
C
2, 8, 8
7) Which of the following elements has a total of 3 electrons?
A
C; carbon
B
Ne; neon
C
Li; lithium
8) Which of the following elements has a total of 6 protons?
A
Li; lithium
B
Ne; neon
C
C; carbon
9) How many electrons can fit in the first orbit of a Bohr-Rutherford diagram?
A
6
B
2
C
4
10) The number of neutrons is found by using this formula
A
Number of electrons + Number of protons
B
Atomic number - Number of electrons
C
Atomic mass - Atomic number
*select an answer for all questions
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