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study guides > DISTRICT TEST 2/7 > Flashcards

DISTRICT TEST 2/7 Flashcards

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1
Q

Determines by period (row) number

A

Energy levels

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2
Q

Determines the proton number

A

atomic number

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3
Q

Equals protons + neutrons

A

Mass Number

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4
Q

Electron Capacity

A

1st level: 2, 2nd level: 8, 3rd level: 8 electrons

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5
Q

Located on the left side of a chemical equation

A

reactants

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6
Q

Located on the right side of a chemical equation

A

products

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7
Q

Heat is on the reactant side

A

Endothermic Reaction

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8
Q

Heat is on the product side

A

Exothermic Reaction

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9
Q

Ions

A

Elements that have lost (positive) or gained (negative) electrons

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10
Q

Isotopes

A

Same element with different mass numbers

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11
Q

Chemical Bonding

A

Elements bond to become stable by obtaining 8 valence electrons

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12
Q

Proton

A

A subatomic particle with a positive charge found in the nucleus.

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13
Q

Mass

A

The amount of matter in an object.

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14
Q

Volume

A

The amount of space occupied by an object.

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15
Q

Density

A

The amount of mass in a certain volume.

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16
Q

Matter

A

Anything that has mass and takes up space.

17
Q

The most massive part of the atom, containing protons and neutrons.

A

Nucleus

18
Q

Ion

A

An element that carries an electric charge due to the loss or gain of electrons.

19
Q

Lost or Gained

A

The process undergone by a positively charged ion in acquiring electrons.

20
Q

Valence Electrons

A

Electrons in the outermost energy level of an atom, involved in bonding.

21
Q

Isotope

A

An element with the same number of protons but different mass numbers.

22
Q

Groups or Families

A

The vertical columns on a periodic table.

23
Q

The sum of protons and neutrons in the nucleus of an atom.

A

Mass Number

24
Q

Energy Levels

A

Determines by the period (row) number on the periodic table.

25
Q

Atomic Number

A

Determines the number of protons in the nucleus of an atom.

26
Q

Molecule

A

Occurs when two or more atoms are held together by a chemical bond.

27
Q

Valence Electrons

A

Elements bond to become stable by obtaining 8 of these.

28
Q

Reactants

A

Substances on the left side of a chemical equation.

29
Q

Products

A

Substances on the right side of a chemical equation.

30
Q

Endothermic Reaction

A

A reaction where heat is on the reactant side.

31
Q

Exothermic Reaction

A

A reaction where heat is on the product side

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