Front

Mendeleev arranged the known chemical elements in a table according to increasing: atomic number, number of electrons, number of protons, mass

Back

mass

Front

Mendeleev gave the name eka-aluminum to a(an)

Back

unknown element he predicted would have properties similar to those of aluminum.

Front

The usefulness of Mendeleev’s periodic table was confirmed by

Back

the discovery of elements with predicted properties.

Front

Identify the segments labeled A and B in the blank periodic table.

Back

A is a period and B is a group.

Front

Moving from left to right across a row of the periodic table, which value increases by exactly one from element to element? (isotope number, atomic number, atomic mass unit, mass number)

Back

atomic number

Front

The atomic mass of an element is

Back

a weighted average of the masses of an element’s isotopes.

Front

One twelfth the mass of a carbon-12 atom is used to define a(an)

Back

atomic mass unit

Front

The unit for atomic mass is

Back

amu

Front

Which list of elements contains only metals? Options: carbon, iodine, tin, copper, cesium, helium, iron, lead, bromine

Back

tin, copper, cesium

Front

Which statement is true about the metalloid silicon? Options: 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.

Back

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