Properties of Atoms and the Periodic Table

Electron in the outermost energy level are called?

• Valence Electron

• Valence Proton

• Valence Neutron

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NGSS.HS-PS1-1

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The majority of the elements in the periodic table are

• Non-Metals

• Metals

• Metalloids

Elements in the same _________ have the same number of valence electrons.

• Period

• Group

the basic structural unit of matter

• atom

• matter

• element

• nucleus

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NGSS.MS-PS1-1

a collection of atoms of one type that cannot be broken down into simpler substances by ordinary chemical or physical means

• element

• subatomic particle

• electron

• matter

UP and DOWN columns on the periodic table are

• groups

• periods

SIDE TO SIDE rows on the periodic table are

• groups

• periods

The group number tells you the number of

• protons

• valence electrons

• energy levels

Tags

NGSS.HS-PS1-1

How are the elements arranged on the periodic table today?

• By atomic mass

• By number of electrons

• By atomic number

• By alphabetic order

How many elements does the periodic table currently have?

(Current = 2018)

• 60

• 118

• 181

• 227