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CHEM-1 Flashcards

(22 cards)

1
Q

ATOM

A

tiny particles making up all

mass

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2
Q

PROTONS AND NEUTRONS

A

collectively called nucleons making up the nucleus of an atom

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3
Q

STRONG NUCLEAR FORCE

A

hold together protons and neutrons to form the nucleus

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4
Q

ELECTRONS

A

surrounds the nucleus at a distance of 1-3 Angstroms

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5
Q

Mass of an electron is about ___ times smaller than the mass of a nucleon.

A

1800

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6
Q

Matter is mostly ____ space.

A

empty

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7
Q

ELEMENTS

A

are building blocks of compounds and can’t be decomposed into simpler substance by chemical means

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8
Q

ATOMIC NUMBER

A

indicates the number of protons

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9
Q

An element may have any number of electrons and neutrons but __________ number of protons.

A

only one

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10
Q

MASS NUMBER

A

sum of protons and neutrons

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11
Q

Not every atom of a given element will have a mass equal to the mass number because isotopes of an atom have different numbers of _______.

A

neutrons

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12
Q

ISOTOPES

A

two or more atoms of the same element that contain different number of neutrons.

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13
Q

ION

A

atom than has an unequal number of protons and electrons creating a charge.

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14
Q

CATION

A

atom carrying more protons than electrons having a + charge

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15
Q

ANION

A

atom carrying more electrons than protons having a - charge

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16
Q

SALT

A

neutral compound composed of a positive and a negative ion together

17
Q

Changing the number of neutrons creates a(n) ____

18
Q

Changing the number electrons creates a(n) _____

19
Q

Changing the number of protons creates a(n)

____

A

different element

20
Q

PERIOD

A

horizontal row in periodic table

21
Q

GROUPS/FAMILIES

A

vertical columns i periodic table

22
Q

METALS

A

large atoms that tend to lose electrons to form positive ions and oxidation states