2.04 Video: Crash Course Chemistry #37

2.04 Video: Crash Course Chemistry #37

9th - 12th Grade

10 Qs

quiz-placeholder

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2.04 Video: Crash Course Chemistry #37

2.04 Video: Crash Course Chemistry #37

Assessment

Quiz

Chemistry

9th - 12th Grade

Easy

Created by

Mrs. Pangerl

Used 11+ times

FREE Resource

10 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

15 mins • 1 pt

Media Image

Around 400 BC, Greek philosopher Democritus proposed that matter is made of indivisible particles called:

Plum pudding

Atomos

Electrons

Answer explanation

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Democritus believed the indivisible atomos of every material had the properties of the material.

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

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Lavoisier proposed the idea that even if matter changes shape or form, its mass stays the same. This idea is:

The Law of Conservation of Mass

Unsupported by experiments

Answer explanation

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Lavoisier is considered the father of modern chemistry for the Law of Conservation of Mass. He also identified the role of oxygen in combustion, named oxygen and hydrogen, and helped construct the metric system.

3.

MULTIPLE CHOICE QUESTION

15 mins • 1 pt

Media Image

In the 1800s, John Dalton determined that:

The positive charge of an atom is concentrated in the nucleus

Electrons are more likely to be found in orbitals

Elements exist as discrete packets of matter. Matter is made of solid, indivisible atoms and atoms of an element are identical.

Answer explanation

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Dalton's theory is sometimes called the "Billiard Ball Model" for the solid atoms. He also found that atoms combine in fixed, whole number ratios to form compounds.

4.

MULTIPLE CHOICE QUESTION

15 mins • 1 pt

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Thomson's experiments indicated cathode rays were actually small, negatively charged particles. He called them corpuscles. What did Thomson discover?

The proton

The neutron

The electron

Answer explanation

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Thomson imagined negatively charged electrons distributed randomly in a positively charged matrix, like the English dessert plum pudding.

5.

MULTIPLE CHOICE QUESTION

15 mins • 1 pt

Media Image

Which atomic model is depicted in this picture?

Billiard Ball Model

Plum Pudding Model

Quantum Model

Answer explanation

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Because plum pudding is not as popular outside England, this model is sometimes referred to as a "chocolate chip cookie" model.

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

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Rutherford's gold foil experiment led to:

The discovery of a positively-charged nucleus

The discovery of the electron

Answer explanation

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Rutherford is considered to be the father of nuclear physics as he discovered the positively-charged nucleus of the atom.

7.

MULTIPLE CHOICE QUESTION

15 mins • 1 pt

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Most alpha particles passed through the atoms undeflected, which indicated to Rutherford that:

Most of the atom is empty space

The billiard ball model was correct

Answer explanation

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Rutherford also bombarded nitrogen with alpha particles, which resulted in hydrogen ions. He recognized that these positive ions were protons.

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