Chem 511 Unit 2 Review: Periodic Table & The Atom

Front

What is a non-metal?

Back

A non-metal is an element that typically lacks the characteristics of metals, such as conductivity and malleability. Examples include oxygen, nitrogen, and selenium.

Front

What are metalloids?

Back

Metalloids are elements that have properties intermediate between metals and non-metals. They are found along the zig-zag 'staircase' on the Periodic Table.

Front

What are subatomic particles with a negative charge called?

Back

Electrons.

Front

What does the atomic number represent on the periodic table?

Back

The atomic number represents the number of protons in the nucleus of an atom and determines the element's identity.

Front

Which model of the atom suggests the existence of negatively charged particles?

Back

The Plum Pudding Model.

Front

What is the atomic mass?

Back

The atomic mass is the weighted average mass of an element's isotopes, measured in atomic mass units (amu).

Front

What is the significance of the zig-zag line on the periodic table?

Back

The zig-zag line separates metals from non-metals and indicates the location of metalloids.

Front

What are protons?

Back

Protons are positively charged subatomic particles found in the nucleus of an atom.

Front

What is the chemical symbol for Selenium?

Back

The chemical symbol for Selenium is 'Se'.

Front

What is the difference between metals and non-metals?

Back

Metals are typically shiny, conductive, and malleable, while non-metals are dull, insulative, and brittle.