Honors Chemistry Chapter 4 Test

1.

Multiple Choice

45 sec

1 pt

J.J. Thomson provided evidence that an atom...

is the smallest particle of matter

contains negatively charged particles

has an overall negative charge

has an overall positive charge

2.

Multiple Choice

1 min

1 pt

Rutherford discovered the...

electron

proton

neutron

nucleus

3.

Multiple Choice

1 min

1 pt

Isotopes are elements with a different amount of

protons

neutrons

electrons

atoms

4.

Multiple Choice

1 min

1 pt

an element will always have the same number of

neutrons

protons

isotopes

atoms

5.

Multiple Choice

1 min

1 pt

Which particle does not contribute mass to the atom?

Proton

Neutron

Electron

Nucleus

6.

Multiple Choice

30 sec

1 pt

What scientist is best known for his gold foil experiment?

J.J. Tomson

Ernest Rutherford

John Dalton

Democritus

7.

Multiple Choice

30 sec

1 pt

An atom has 10 protons and a mass of 18. It has __ neutrons

10

18

28

8

8.

Multiple Choice

45 sec

1 pt

An ______________ is the same element, with the same number of protons, but different numbers of neutrons

Atom

Isotope

Atomic Number

Mass Number

9.

Multiple Choice

1 min

1 pt

The smallest particle into which an element can be divided and still be the same substance

neutron

atom

electron

10.

Multiple Choice

30 sec

1 pt

The mass number of an element that has18 protons, 18 electrons, and 19 neutrons is _____.

12.5

13

25

37

11.

Multiple Choice

30 sec

1 pt

How many neutrons does uranium-239 have

92

147

239

331

12.

Multiple Choice

30 sec

1 pt

How many neutrons will an atom have it has an atomic number of 26, an atomic mass of 58 and a charge of +3?

26

58

32

3

13.

Multiple Choice

30 sec

1 pt

How many electrons are in an atom that has an atomic number of 34, an atomic mass of 74 and a charge of -2?

34

36

2

40

14.

Multiple Choice

30 sec

1 pt

How many protons are in an atom with an atomic number of 20, an atomic mass of 45, and a charge of +2?

20

10

2

18

15.

Multiple Choice

30 sec

1 pt

What charge does an atom have if it GAINS an electrons?

Positive (+)

Negative (-)

16.

Multiple Choice

30 sec

1 pt

Which Greek Philosopher believed that matter is composed of tiny particles called atoms?

Democritus

Aristotle

Phytagoras

Plato

17.

Multiple Choice

2 mins

1 pt

Rutherford's gold foil experiment provided evidence that...

negative and positive charges are spread evenly throughout the atom.

alpha particles have a positive charge.

gold is not a dense as previously thought.

there is a dense positively charged nucleus at the center of an atom.

18.

Multiple Choice

5 mins

1 pt

True or False: The majority of an atom is made up of empty space

True

False

19.

Multiple Choice

30 sec

1 pt

What does the nucleus of an atom contain?

Electrons and neutrons

Protons and neutrons

Neutrinos and positrons

DNA and RN

20.

Multiple Choice

30 sec

1 pt

Which of the following scientist discovered the current model of the atom?

Dalton

Schrodinger.

Thomson

Dalton

21.

Multiple Choice

30 sec

1 pt

Discoverer of the neutron?

Jimmy

Chadwick

Charleston

Rutherford

22.

Multiple Choice

30 sec

1 pt

John Dalton wrote postulates to make the idea of the atom useful. Which postulate below was proven wrong?

All elements are made up of tiny indivisible particles called atoms.

The atoms of one element are different from the atoms of another element.

Atoms of different elements chemically combine to form chemical compounds.

During chemical reactions, atoms are rearranged.

23.

Multiple Choice

30 sec

1 pt

What determines the identity of the atom?

protons

neutrons

electrons

isotopes

24.

Multiple Choice

30 sec

1 pt

Calculate the average atomic mass of silver.

106.38649amu

111.91896amu

107.8677amu

121

25.

Multiple Choice

5 mins

1 pt

An element has two naturally occurring isotopes. One is 10.013 amu and is 19.9% abundant. The other is 11.01 amu and is 80.1% abundant. What is the average atomic mass? What element is it?

9.012, Beryllium

12.011, Carbon

6.941, Lithium

10.812, Boron

26.

Multiple Choice

2 mins

1 pt

Isotopes are atoms of the same element that have the same number of __________ but different number of __________ . Therefore, isotopes of the same element have different masses.

protons, neutrons

protons, electrons

neutrons, protons

electrons, protons

27.

Multiple Choice

3 mins

1 pt

A neutral atom of the isotope ²⁶₁₂Mg would consist of

12 protons, 26 neutrons, 26 electrons

26 protons, 12 neutrons, 26 electrons

26 protons, 14 neutrons, 14 electrons

12 protons, 14 neutrons, 12 electrons

28.

Multiple Choice

30 sec

1 pt

A neutral atom would become an ion that has a charge of 2+ by

Losing two protons

Losing two neutrons

Losing two electrons

29.

Multiple Choice

30 sec

1 pt

If neutral copper atom (atomic number 29) becomes an ion that has a charge of 2+, how many electrons does the resulting ion have?

27

28

29

31

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