LUOA's 8th Grade Physical Science 9.29.F - Quiz: Atoms and the Periodic Table

Who developed the early version of the periodic table based on atomic mass?

Dmitri Mendeleev

Describe the composition of the nucleus of an atom.

It is composed of protons and neutrons.

Lithium, sodium, and potassium are examples of ____________.

alkali metals

The elements in Group 1A of the periodic table, except for hydrogen, are called the _____________________.

alkali metals

The elements in Group 2A of the periodic table chart are known as ____________________.

alkaline earth metals

The smallest unit of an element that retains all the characteristics of that element is called a(n)

atom

Which subatomic particle has a negative charge?

electron

The ability of an element to bend is called _____________.

malleability

Which subatomic particle has a neutral charge?

neutron

Helium, neon, and argon are examples of

nonmetals

At the center of every atom lies a small, dense ____________ that is positively charged.

nucleus

The periodic table is a(n) ________________________ used in most chemistry classrooms and labs.

organizational tool

The arrangement of elements in columns, based on a set of properties that repeat from row to row is called the _____________ ____________

periodic table

The elements in groups 3 through 12 are called _________________.

transition metals