The Periodic Table

How many elements are on the periodic table?

• 10

• 18

• 100

• 118

The only metal that is a liquid at room temperature is _________.

• water

• mercury

• bromine

• calcium

Which element is classified as a "coinage metal"?

• gold

• mercury

• lead

• iron

The elements of today's periodic table are arranged _______.

• by increasing atomic weight

• by increasing atomic number

• in alphabetical order

• in the order they were discovered

The atomic number of an atom is equal to the ________.

• number of neutrons in the nucleus

• the number of protons + neutrons in the nucleus

• the number of electrons + protons in the nucleus

• the number of protons in the nucleus or the number of electrons in the electron cloud

The modern periodic table, in which elements were organized by atomic weight, was created by ________.

• Albert Einstein

• Dmitri Mendeleev

• Henry Moseley

• Isaac Newton

Some elements have symbols that come from the ______ word for that element.

• Greek

• Mandarin

• Portuguese

• Latin

The modern periodic table was modified by ________ , who arranged the known elements by their increasing atomic numbers.

• Henry Moseley

• Albert Einstein

• Dmitri Mendeleev

• Isaac Newton

A vertical column of the periodic table is called a _____.

• group or family

• tower
• period
• crew

Which element is in period 1 group 18?

• Helium

• Hydrogen

• Neon

• Lead