Periodic Table Test

Moving from left to right across a row of the periodic table, which of the following values increases by exactly one from element to element?

• isotope number

• atomic number

• atomic mass unit

• mass number

Which statement is true about the metalloid silicon?

• Silicon is a better conductor of electric current than silver is

• Silicon does not conduct electric current under any conditions

• Silicon's ability to conduct electric current does not vary with temperature

• Silicon is a better conductor of electric current than sulfur is

Two highly reactive elements in Period 2 are the metal lithium and the

• metalloid arsenic

• nonmetal selenium

• nonmetal fluorine

• nonmetal krypton

Atoms of the most reactive elements tend to have

• one or seven valence electrons

• eight valence electrons

• four or five valence electrons

• no valence electrons

Compared with Group 2A elements, Group 6A elements have

• more atoms in the ground state

• more valence electrons

• more isotopes

• fewer valence electrons

The tendency of an element to react is closely related to

• its atomic mass

• attractions between its atoms

• the number of valence electrons in atoms of the element

• the ratio of protons to neutrons in atoms of the element.

Which statement is NOT true about the elements fluorine, chlorine, and iodine?

• They are all halogens

• They react easily with metals

• They are similar to noble gases

• They are all nonmetals

Among the alkali metals, the tendency to react with other substances

• does not vary among the members of the group

• increases from top to bottom within the group

• varies in an unpredictable way within the group

• decreases from top to bottom within the group

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Which element is found in nature only in compounds?

• sodium

• helium

• oxygen

• nitrogen

What charge do group 16 atoms have when they become ions?

• +1

• +2

• -1

• -2