Atoms, Elements and the Periodic Table

A metal that can be pounded into a shape is

Which choice shows particles in order from smallest to largest.

An unknown atom has 30 protons,30 electrons and 35 neutrons. Its mass number is ____ 

Horizontal rows of the periodic table are called

The nucleus of an atom contains______________________.

Which subatomic particle has a mass of 1 AMU and has no charge?

The only metal that is a liquid at room temperature is 

Today's periodic table is organized according to....

Atoms often have a different number of neutrons. These are called....

NH₃  has a total of _____________ elements

Atoms are neutral because ....

The maximum number of valence electrons in the outer orbit of any element

The elements in each family of the periodic table have the same 

The 18th column and furthest to the right on the table is known as the...

What is the maximum number of electrons that can be found in the first energy level of an atom?

Vertical columns of the periodic table are called ....

Unlike metals, many non-metals are

The subatomic particle that determine's an atom's location on the periodic table is...

Which scientist devised the first periodic table of the elements?

Which of the following substances CANNOT be broken down into other substances?

The outer orbit of electrons are called...

How is it possible to have carbon 12 and carbon 14?