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Biology > Chapter 2 Lesson 1 > Flashcards

Chapter 2 Lesson 1 Flashcards

1
Q

What is an atom ?

A

The basic unit of matter.

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2
Q

What are atoms made up of ?

A

Subatomic particles (protons, neutrons, electrons)

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3
Q

What charge does a proton have ?

A

Positive

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4
Q

What charge does an electron have?

A

Negative

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5
Q

What charge does a neutron have ?

A

Neutral (no charge)

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6
Q

What is the outer part of an atom called (3 things)

A
  1. Electron cloude
  2. Shell
  3. Energy level
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7
Q

What is the inner part of the atom called ?

A

Nucleus

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8
Q

What is the atomic number ?

A

Number of protons in an atom. & entity of same element

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9
Q

When is an atom electrically neutral ?

A

When it has the same number of protons and electrons.

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10
Q

What is a chemical element ?

A

Pure substance that consists entirely of one type of atom

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11
Q

What is an isotope ?

A

Atoms of the same element with same number of protons and electrons but different number of neutrons.

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12
Q

What is a chemical compound ?

A

Substance that is formed by chemical combination of 2 or more elements in definite proportion.

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13
Q

What about a compound is different from the elements they’re made of ?

A

Physical and chemical properties

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14
Q

What holds together atoms in a compound

A

Chemical bonds.

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15
Q

What is a valance electron ?

A

Electron available to form a bond

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16
Q

What are the three types of bonds ?

A

Ionic bond
Covalent bond
Van deal Waal force

17
Q

What forms the nucleus ?

A

Strong forces that bind protons and neutrons together

18
Q

What is the mass number ?

A

The total number of protons and neutrons in the nucleus.

19
Q

What are the main kinds of chemical bonds ?

A

Ionic and covalent

20
Q

What is an ionic bond ?

A

One or more electrons are transferred from one atom to another

21
Q

What happens to an atom that looses an electron ?

A

Becomes positive.

22
Q

What happens to an atom that gains an electron ?

A

It becomes negative.

23
Q

What is an ion?

A

Positively and negatively charged atoms

24
Q

What is a single covalent bond ?

A

When an atom shares two electrons

25
Q

What is a double bond ?

A

When atom shares 4 electrons.

26
Q

What is a triple bond ?

A

When atom shares 6 electrons

27
Q

What is a molecule ?

A

Structure that results when atoms are joined together by covalent bonds.

28
Q

What is the smallest unit of most compounds ?

29
Q

What is Van De Waal’s force ?

A

Intermolecular force of attraction that holds molecules together.

Biology (13 decks)

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