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Chapter 1 Introduction to the body > Chapter 2 - Chemistry of life > Flashcards

Chapter 2 - Chemistry of life Flashcards

Chemistry

1
Q

What is a Nucleus?

A

Central core of atom

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2
Q

What is a proton?

A

Positively charged particles in nucleus

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3
Q

what is a neutron?

A

No-charged particle in nucleus

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4
Q

What is an atomic number?

A

Number of protons in the nucleus

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5
Q

What is an atomic mass?

A

Number of protons and neutrons combined

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6
Q

Orbitals are arranged into ______.

A

Energy Levels

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7
Q

What are energy levels?

A

Regions surrounding atomic nucleus that contain electrons.

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8
Q

What are three facts about Electrons?

A
  1. It is an negatively charged particle
  2. can contain up to eight electrons in each level
  3. The amount of electrons in outer energy level can determine the chemical behavior
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9
Q

What is an element?

A

A Pure Substance that is composed of one type of atom

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10
Q

What is a molecule?

A

Larger chemical unit of atoms

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11
Q

What is a compound?

A

Substances whose molecules have more than one element

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12
Q

What determines atoms present in a compound?

A

Chemical Formula

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13
Q

What is a isotope?

A

Two atoms that have the same atomic number but different atomic masses

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14
Q

What is radioactive isotopes?

A

it is an isotope that emits radiation

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15
Q

When do ions form?

A

When an atom gains or loses electrons in its outer energy level to become stable.

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16
Q

What is a positive ion?

A

has more protons than electrons

17
Q

What is a negative ion?

A

Has gained electrons

18
Q

what dissolves ionics?

A

Water

19
Q

How does ionic bonds form?

A

When oppositely charged ions attract each other

20
Q

what is a Electrolyte?

A

Forms ions when dissolved in water

21
Q

How does ions show its charge in symbols?

A

+ or -

22
Q

When do covalent bonds form?

A

Forms when atoms share their outer energy to fill up and thus becomes stable.

23
Q

What do hydrogen bonds do?

A

Weak forces hold molecules in folded shapes or in groups.

24
Q
A

Chapter 1 Introduction to the body (2 decks)

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