Summer II Chemistry Final Review A

The modern periodic table is arranged in order of increasing atomic ____.

• mass

• charge

• number

• radius

Who arranged the elements according to atomic mass and used the arrangement to predict the properties of

missing elements?

• Henry Moseley

• Antoine Lavoisier

• John Dalton

• Dmitri Mendeleev

In which of the following sets is the symbol of the element, the number of protons, and the number of

electrons given correctly?

• In, 49 protons, 49 electrons

• Zn, 30 protons, 60 electrons

• Cs, 55 protons, 132.9 electrons

• F, 19 protons, 19 electrons

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NGSS.HS-PS1-1

What element has the electron configuration 1s ² 2s² 2p ⁶ 3s² 3p ² ?

• Nitrogen

• Selenium

• Silicon

• Silver

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NGSS.HS-PS1-2

Which subatomic particle plays the greatest part in determining the properties of an element?

• proton

• electron

• neutron

• none of the answers

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NGSS.HS-PS1-2

Atomic size generally ____

• decreases as you move from top to bottom within a group

• decreases as you move from top to bottom within a group

• remains constant within a period

• decreases as you move from left to right across a period

Which of the following statements is true about ions?

• Cations form when an atom gains electrons.

• Cations form when an atom loses electrons.

• Anions form when an atom gains protons.

• Anions form when an atom loses protons

Which of the following statements is NOT true about ions?

• Cations are positively charged ions.

• Anions are common among nonmetals.

• Charges for ions are written as numbers followed by a plus or minus sign.

• When a cation forms, more electrons are transferred to it

What is the energy required to remove an electron from an atom in the gaseous state called?

• nuclear energy

• ionization energy

• shielding energy

• electronegative energy

How many valence electrons are in an atom of phosphorus?

• 2

• 3

• 4

• 5

Tags

NGSS.HS-PS1-1