Atomic structures Flashcards

1
Q

Why are atoms neutral

A

There are the same number of protons and electrons

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2
Q

What is the atomic number

A

The number of protons

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3
Q

What is the mass number

A

The number of protons and neutrons

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4
Q

Are protons positive or negative

A

Positive

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5
Q

Are electrons positive or negative

A

Negative

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6
Q

Where are the protons, neutrons and electrons located

A

The protons and neutrons are found in the nucleus and the electrons are around the edge

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7
Q

What does AMU start for

A

Atomic mass unit

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8
Q

What is in the periodic table

A

A table of chemical elements, arranged by atomic number

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9
Q

Which group number is alkali metals

A

Group 1

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10
Q

What is group 7

A

Halogens

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11
Q

What is group 0

A

Noble gases

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12
Q

What is an isotope

A

Atoms with the same atomic number but different mass numbers

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13
Q

What is the mass of a proton

A

1 amu

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14
Q

How do you know which element goes first

A

The one nearest the left comes first

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15
Q

What is the mass of a neutron

A

1 amu

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16
Q

What is a compound

A

When elements combine or join together and new substances are formed

17
Q

How many electrons can the first energy level (the one nearest the nucleus) hold

A

2

18
Q

If there are only two elements in a compound what ending will it have

A

ide

19
Q

If a compound with three elements contains oxygen what ending will it have

A

ate or ite

20
Q

Name the prefixes from 1 - 6

A

Mono, di, tri, tetra, penta, hexa

21
Q

Describe the valency number pattern

A

1,2,3,4,3,2,1,0

22
Q

What is the mass of an electron

A

0 amu

23
Q

Describe the five steps of writing a chemical formula

A

Write the symbols, write the valencies, swap the valencies, simplify in needed, write the formula

24
Q

The substances you start with in a chemical reaction are called the ______ and the new substances are called the _____

A

Reactants and products

25
Q

What is an ion

A

An atom that has more or less electrons, making it positively or negatively charged