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Organisation of the human body > Chemistry > Flashcards

Chemistry Flashcards

1
Q

What is an element?

A

Elements make up all matter

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2
Q

What is the smallest part of an element?

A

An atom

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3
Q

How many elements are in the human body?

A

20

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4
Q

What are the most common elements of the human body?

A

Oxygen (65%)
Carbon (18.5%)
Hydrogen (9.5%)
Nitrogen (3.3%)

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5
Q

What makes up an atom?

A

An atom consists of protons, nuetrons and electrons

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6
Q

Protons

A

Have a positive charge and found in the nucleus

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7
Q

Electrons

A

Have a negetive charge and found in the electron orbiting shell

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8
Q

Neutrons

A

Have a neutral charge and found in the nucleus

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9
Q

What is an atomic number?

A

The number of protons in the atom

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10
Q

Octet Rule

A

Where an atom wants 8 electrons in its outer shell to make it happy/stable.

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11
Q

What is a bond?

A

When elements combine with other elements to make compounds or molecules.

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12
Q

How can an atom get to a stable state?

A

By gaining, loosing or sharing electrons

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13
Q

What is a chemical bond?

A

Is a force or attraction between positive and negetive charges that keep two atoms closely associated with each other to form a molecule

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14
Q

What is an Ionic Bonds?

A

The loss of one or more electrons by one atom and a gain of electrons by another atom

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15
Q

What is an ion?

A

When an atom looses or gains one or more electron and the charge changes the number or protons and electrons

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16
Q

When the charge changes to a positive charge, it is called?

A

Cation

17
Q

When the charge changes to a negetive charge, it is called?

A

Anion

18
Q

What is a convalent bond?

A

The sharing of electrons between atoms

19
Q

What are disulphide bonds?

A

Convalent bonds between atoms

20
Q

What is it when a hydrogen atom shares its one electron in a convalent bond with another atom, gaining a slightly positive charge?

A

Hydrogen Bond

21
Q

What is H2?

A

An element

Organisation of the human body (15 decks)

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