What chemist arranged the elements according to increasing atomic masses and then discovered the relationship that he called the law of octaves?

• John Newlands

• Henry Cavendish

• Henry Moseley

• Linus Pauling

Who was given credit for developing the first ordered of table of elements?

• Henry Moseley

• John Newlands

• Dmitri Mendeleev

• Antoine Lavoisier

Whose work resulted in the revision of the periodic law and the atomic number being used as the organizing factor for the elements of the periodic table?

• Lord Rayleigh

• John Dalton

• Dimitri Mendeleev

• Henry Moseley

Explain why elements in the same group have similar physical and chemical properties?

• They have a similar surface area.

• They have a similar electrical charge.

• They have a similar nuclear construction.

• They have a similar electron configuration.

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NGSS.HS-PS1-1

NGSS.HS-PS1-2

What is the only metal that is a liquid at room temperature?

• lithium

• mercury

• magnesium

• barium

Atomic radius is defined as

• the distance from the center of the atom’s nucleus to its innermost electron

• the distance from the center of the atom’s nucleus to its outermost electron

• the distance from the center of the atom’s nucleus to the outermost portion of its nucleus

• the distance from the center of the atom’s nucleus to its central electron

Calcium is in the lower left section of the periodic table, and chlorine is in the upper right. Which has the smaller atomic radius?

• Calcium

• Chlorine

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NGSS.HS-PS1-1

Which property measures the energy required to remove an outermost electron?

• atomic size

• ionic size

• ionization energy

A larger atomic radius means a ____________ ionization energy; a smaller atomic radius means a ____________ ionization energy.

• larger; smaller

• smaller; larger

• smaller; smaller

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NGSS.HS-PS1-1

NGSS.HS-PS1-2

Your TEST will ask you to compare a variety of elements in terms of atomic radius, ionization energy, and electronegativity. MAKE SURE YOU KNOW THE DIFFERENT PERIODIC TRENDS. You should have labeled this on your periodic table.

• Yes, I understand.

• No

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NGSS.HS-PS1-2