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chemistry final review

Chemistry

KG - University

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chemistry final review
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50 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

An atom of an element with atomic number 8 and mass number 17 contains which of the following combinations of subatomic particles?

9 electrons, 8 protons, 8 neutrons
17 neutrons, 8 protons, 8 electrons
9 protons, 9 neutrons, 8 electrons
8 protons, 8 electrons, 9 neutrons

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Media Image

How do isotopes C-12 and C-14 differ from one another?

C-14 has 2 more protons 
C-14 has 2 more neutrons 
C-14 has 2 more electrons
C-14 has 14 protons

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following particle(s) is found inside the nucleus?

protons and neutrons
protons and electrons
neutrons and electrons
electrons only

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How many valence electrons are found in a Ba atom?

2
1
4
6

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which is true of Rutherford’s Gold Foil experiment?

atoms are mainly empty space
nucleus has almost all the mass of the atom
nucleus only occupy very small part of the atom
all of the options

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following is a polar molecule?

H2
O2
H2O
NaCl

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the percent by mass of Calcium in Calcium oxide?

71%
17%
40%
47%

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