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CHEMISTRY iGCSE > GENERAL KNOWLEDGE > Flashcards

GENERAL KNOWLEDGE Flashcards

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1
Q

What is an element?

A

A pure chemical substance consisting of atoms all with the same atomic number (or the number of protons).

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2
Q

What is an ion?

A

A charged atom or molecule where the number of electrons does not equal the number of protons.

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3
Q

What is a molecule?

A

Two or more atoms chemically bonded together.

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4
Q

What is the atomic number of an element?

A

The number of protons

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5
Q

What is the relative atomic mass of an element?

A

The number of protons plus the number of neutrons.

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6
Q

What is the relative atomic mass of a proton?

A

1

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7
Q

What is the relative atomic mass of a neutron?

A

1

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8
Q

What is the relative atomic mass of an electron?

A

1/2000

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9
Q

What is the charge of a proton?

A

+1

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10
Q

What is the charge of a neutron?

A

0 - No charge

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11
Q

What is the charge of an electron?

A

-1

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12
Q

Which group in the periodic table is called the halogens? Name two of the halogens.

A

Group 7

Fluorine
Chlorine
Bromine
Iodine
Astatine
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13
Q

What is the charge of any halogen ion? Eg a chloride ion.

A

-1

So Cl-

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14
Q

Which group of the periodic table is called the alkali metals? Name two of the alkali metals.

A

Group 1

Lithium
Sodium
Potassium
Rubidium
Cesium
Francium
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15
Q

What is the charge of any alkali metal ion? Eg a sodium ion

A

+1

So Na+

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16
Q

Which group of the periodic table is called the alkaline earth metals? Name two of the alkaline earth metals.

A

Group 2

Beryllium
Magnesium
Calcium
Strontium
Barium
Radium
17
Q

What type of bonding forms the chemical bonds between a metal and a non-metal?

A

Ionic bonding

18
Q

What type of bonding forms the chemical bonds between two non-metals?

A

Covalent

19
Q

What is a covalent bond?

A

A chemical bond that involves the sharing of pairs of electrons between atoms.

20
Q

What is an ionic bond?

A

A chemical bond that involves the attraction of two ions with opposing charges. This usually happens as a result of the transfer of one or more electrons from one atom to the other.

21
Q

What is an isotope?

A

Different atomic forms of the same element with the same number of protons but a different number of neutrons.

CHEMISTRY iGCSE (11 decks)

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