Facts I need to Memorize

Protons are

• positively charge

• mass of 1 amu

Neutrons

• have no charge

• have a mass of 1 amu

• are negatively charged

Electrons

• small with a mass of 1/2000 amu

• negatively charge

• positively charged

Tags

NGSS.HS-PS2-5

Nucleus of the atom

• is positive

• is surrounded by negatively charged electrons

• is surrounded by negatively charged protons

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NGSS.HS-PS1-8

number of protons

• equals number of electrons

• identifies an element

mass of protons equals

• mass of electrons

• mass of neutrons

particle arrangement means

• how the particles are bounded to each other

• CO₂ and C₂O, for example, have different particle arrangement

Tags

NGSS.HS-PS1-3

Metals

• are good conductors of electricity

• do not conduct electricity

• are malleable

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NGSS.HS-PS2-5

A number after the element, like C-14 is the

• mass number

• number of protons

Elements that have atoms with stable valence electron configurations in the ground state are found in

• Group 1

• Group 3

• Group 18

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2