Grade 10 Chemistry

Front

How many valence electrons does Iodine have?

Back

7

Front

What does the atomic number tell you?

Back

The atomic number tells you the number of protons in an atom.

Front

What is the chemical reaction when lead reacts with oxygen?

Back

Pb + O₂ → PbO

Front

What is the charge of copper in the compound CuBr₂?

Back

+2

Front

What is the name for the ionic compound NaF?

Back

Sodium fluoride

Front

What are valence electrons?

Back

Valence electrons are the electrons in the outermost shell of an atom that are involved in chemical bonding.

Front

What is an ionic bond?

Back

An ionic bond is a type of chemical bond formed through the electrostatic attraction between oppositely charged ions.

Front

What is the difference between an element and a compound?

Back

An element is a pure substance made of only one type of atom, while a compound is a substance formed when two or more different elements are chemically bonded together.

Front

What is the formula for calculating the number of neutrons in an atom?

Back

Number of Neutrons = Atomic Mass - Atomic Number.

Front

What is the significance of the periodic table?

Back

The periodic table organizes elements based on their atomic number, electron configuration, and recurring chemical properties.