Atoms are made up of what 3 parts?

protons, neutrons, and electrons

positive, negative, and neutral

Conservation of mass means

atoms present before chemical reactions are present after

all the atoms present before a chemical reaction are not present after

new substances and new elements are formed in a chemical reaction

Atomic Mass is the number of

protons and neutrons in the nucleus of an atom

protons and electrons in the nucleus of an atom

neutrons and electrons in the nucleus of an atom

a substance that cannot be split into simpler substances

a substance that can be split into simpler substances

A pure substance that is a compound is made out of

particles of more than one type of atom

particles of the same type of atom

a mixture of two or more substances that can be physically separated

Signs of a chemical change include;

change of colour, change of temperature, precipitate (solid) formed, gas released.

change of colour, reversing back to original form, precipitate (solid) formed, gas released.

What is Avogadro's number?

6.02 × 1 0 23 6.02\times10^{23} 6 . 0 2 × 1 0 2 3

2.3 × 1 0 6.02 2.3\times10^{6.02} 2 . 3 × 1 0 6 . 0 2

2.06 × 1 0 23 2.06\times10^{23} 2 . 0 6 × 1 0 2 3

If I gain electrons I become

negative because I've added electrons

Positive because I've added to my atom

equal because now I have electrons

Calcium (Ca) is in group 2 on the Periodic Table. What does this tell you about this element?

It has 2 protons in its nucleus.

It has 2 energy levels/shells in its electron cloud.

Silicon (Si) is in period 3 on the Periodic Table. What does this tell you about this element?

It has 3 energy levels/shells in its electron cloud.

It is highly reactive with water.

It has 3 protons in its nucleus.

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Egbert Fiallos

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MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The Billiard Ball is the nickname for ________ theory.

Dalton

Neils Bohr

JJ Thomson

Ernest Rutherford

Electron cloud is based on

Quantum Mechanics

Gold Foil Experiment

Matter is made up of small particles called atoms

Nuclear Theory

He developed the planetary model of the atom.

Rutherford

Bohr

Chadwick

Dalton

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

James Chadwick discovered the ________.

proton

neutron

electron

nucleus

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What did Thomson discover?

electron

proton

neutron

electron cloud

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What does this image represent

Billiard Ball

Solar System

Plum Pudding

Electron Cloud

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The Gold Foil experiment was done by __________.

Chadwick

Bohr

Rutherford

Thomson

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What did Thomson discover?

What does this image represent

The Gold Foil experiment was done by __________.

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