elements, compounds, and mixtures; atomic structure and the periodic table

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8 Terms

1
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elements

made of only one type of atom

  • atoms that have the same number of protons

2
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compound

two or more elements that have reacted with eachother and formed chemical bonds

3
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mixtures

a substance made up of two or more elements or compounds that is not chemically bonded

4
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question 1

NH4 has + charge

SO4 has 2- charge

you need two NH4 for every SO4

(NH4)2SO4

<p>NH4 has + charge</p><p>SO4 has 2- charge</p><p>you need two NH4 for every SO4</p><p>(NH4)2SO4</p>
5
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question 2

Al has 3+ so the electronic configuration is 2,8

N has 3- so the electronic configuration is 2,8

<p>Al has 3+ so the electronic configuration is 2,8</p><p>N has 3- so the electronic configuration is 2,8</p>
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more metallic

if theres less valence electrons, it is more metallic because its easier to lose electrons and form ionic bonds

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relative mass of an electron

1/1836

8
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relative mass of a neutron and proton

1

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