chemistry quiz 1 Flashcards

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1
Q

what is matter?

A

anything that occupies space and has mass

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2
Q

what is an atom?

A

smallest unit of matter?

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3
Q

what is in center of the atom?

A

nucleus

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4
Q

what is the part around the atom called? what does it create?

A

electrons> orbitals, electron cloud

energy

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5
Q

where is a proton located and what kind of energy does it give off ?

A

in the nucleus and it gives off positive energy

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6
Q

where is the neutron located and what kind of energy do it give off?

A

in the nucleus

neutral energy

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7
Q

what kind of energy does an electron give off and where is it located?

A

negative energy

on the orbitals

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8
Q

what is atomic mass?

A

the number of protons and neutrons (added)

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9
Q

what is atomic number?

A

the number of protons

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10
Q

what is isotopes?

A

additional number of neutrons

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11
Q

where are isotopes used?

A

autoradiography

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12
Q

what is autoradiography?

A

when doctors deliberately make your neutrons increase more than your electrons

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13
Q

what happens in autoradiography?

A

your electrons go crazy because there are more neutrons so then they glow which outlines the problem

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14
Q

what is an element? an example?

A

composed of only one kind of atom in symbols

C, He

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15
Q

what is chemical formula?

A

the number and kind of each atom

H2«

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16
Q

what are subscripts?

A

the number of atoms of the element

17
Q

what is a molecule?

A

2 or more atoms of an element held by a bond

18
Q

what are diatomic molecules?

A

2 atoms of the same element

19
Q

what is a compound?

A

2 or more elements chemically combined.

20
Q

what is ionic bond?

A

the transfer of electrons.

21
Q

what is cation?

A

(+) particles

22
Q

what is anion?

A

(-) particle

23
Q

what is a -++?

A

a neutral