9th Grade Physical Science Chapter 5 Test

Mendeleev arranged the known chemical elements in a table according to increasing

• atomic number

• number of electrons

• number of protons

• mass

In a periodic table, a set of properties repeats from

• element to element

• group to group

• column to column

• row to row

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

• compound containing aluminum

• mixture of aluminum and an unknown element

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

• rare isotope of aluminum

The usefulness of Mendeleev's periodic table was confirmed by

• the discovery of subatomic particles

• its immediate acceptance by other scientists

• the discovery of elements with predicted properties

• the discovery of the nucleus

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

The standard on which the atomic mass unit is based is the mass of a

• proton

• neutron

• chlorine-35 atom

• carbon-12 atom

The atomic mass of an element is

• the sum of the protons and neutrons in one atom of the element

• twice the number of protons in one atom of the element

• a ratio based on the mass of a carbon-12 atom

• a weighted average of the masses of an element's isotopes

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

• atomic number

• atomic mass

• mass number

• atomic mass unit

The unit for atomic mass is

• gram

• amu

• pound

• none of the above

Which list of elements contains only metals?

• carbon, iodine, tin

• tin, copper, cesium

• helium, iron, copper

• iodine, carbon, argon