T1.3 and 1.4 Bonding and the Periodic Table

What is a notable historical event associated with the reactivity of hydrogen?

• The sinking of the Titanic in 1912

• The Hindenburg Disaster in 1937

• The eruption of Mount Vesuvius in 79 AD

• The Great Fire of London in 1666

Where is hydrogen located on the periodic table?

• Upper right corner

• Lower left corner

• Upper left corner

• Lower right corner

Why is hydrogen rarely found on Earth as a pure element?

• It is too heavy to remain in the atmosphere

• It is usually combined with oxygen in water

• It is not reactive enough to form compounds

• It is only found in the sun

A ____ is a substance that form when atoms from two or more elements bond together.

• compound

• atom

• nucleus

• periodic table

Tags

NGSS.MS-PS1-1

Which of the following is an example of a compound?

• NaCl

• O2

• H2

• N2

Tags

NGSS.MS-PS1-1

What are valence electrons?

• Electrons in the innermost shell

• Electrons that have the highest energy

• Electrons that have the lowest energy

• Electrons that are not part of an atom

Where are valence electrons located in an atom?

• In the innermost shell

• In the outermost shell

• In the nucleus

• In the middle shell

What does the term "reactivity" refer to in chemistry?

• The color change of an element

• The ease and speed with which an element combines, or reacts, with other substances

• The melting point of an element

• The density of an element

What is reactivity based on?

• The number of protons in the nucleus

• The interactions of valence electrons

• The atomic mass of the element

• The physical state of the element

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Are metals reactive?

• No, they are not reactive

• Yes, they are reactive

• Only when heated

• Only in liquid form

Tags

NGSS.MS-PS1-2