Atoms and Elements Flashcards

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1
Q

On which part of the periodic table do you find non-metallic elements?

A

Right hand side

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2
Q

What is the smallest part of an element that can exist?

A

Atom

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3
Q

Group 1 in the periodic table is also known as

A

Alkali metals

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3
Q

Group 7 in the periodic table is also known as

A

Halogens

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4
Q

Helium, Neon, Argon and Krypton are found in group 0 and they are examples of

A

Noble gases

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5
Q

Define a molecule

A

A defined group of non-metal atoms that are chemically bonded

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6
Q

Define a compound

A

Two or more elements chemically bonded in a fixed ratio.

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7
Q

Potassium phosphate contains potassium, phosphorous and what else?

A

Oxygen

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8
Q

Define a mixture

A

Two or more elements or compounds are present without being chemically bonded together.

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9
Q

Define a lattice

A

A regular three-dimensional arrangement of atoms (or ions) in a solid

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10
Q

How does mass change in a chemical reaction?

A

It doesn’t. The total mass of reactants = total mass of products

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11
Q

Which particles are found in the nucleus?

A

Protons and neutrons

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12
Q

What is the charge of an electron?

A

Negative

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13
Q

Which two subatomic particles have the same mass?

A

Protons and Neutrons

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14
Q

What is the overall charge of an atom?

A

0

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15
Q

What does the atomic number tell us?

A

Number of protons. This determines the element.

16
Q

What does the mass number represent?

A

Number of protons + neutrons

17
Q

What is the charge of a neutron?

A

Zero. No charge

18
Q

How many electrons can fit on the first electron shell?

A

2

19
Q

What is the maximum number of electrons that can fit on the second electron shell?

A

8

20
Q

What can electron shells also represent?

A

Energy levels