Unit 2 Atoms and Periodic Table

How many neutrons does Beryllium (Be) most likely have?

• 9

• 4

• 5

• 13

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NGSS.MS-PS1-1

Elements in the same group on the periodic table have similar chemical properties.

• True

• False

What is a characteristic of metals on the periodic table?

• High electronegativity

• Brittle and non-malleable

• Gaseous at room temperature

• Good conductors of electricity

Based on the periodic table below, What is the atomic mass of Barium (Ba)?

• 137.33 u

• 85.47 u

• 63.55 u

• 12.01 u

Nitrogen (N) has 7 protons.

• True

• False

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NGSS.MS-PS1-1

Who is credited with the development of the first periodic table?

• Dmitri Mendeleev

• Marie Curie

• Antoine Lavoisier

• Niels Bohr

The number of protons in an atom is equal to its atomic number.

• True

• False

Based on the Bohr model of Sulfur, how many protons will it most likely have?

• 14

• 16

• 18

• 20

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NGSS.MS-PS1-1

How is atomic mass calculated?

• By combining the total count of protons and electrons in an atom.

• By adding up the masses of protons, neutrons, and electrons in an atom.

• By dividing the count of protons by the count of neutrons.

• By multiplying the mass of electrons by the count of protons.

Elements are made up of different types of atoms.

• True

• False

Tags

NGSS.MS-PS1-1