Atomic Structure and pH

Front

What is pH?

Back

pH is a scale used to measure the acidity or alkalinity of a solution, ranging from 0 (very acidic) to 14 (very alkaline), with 7 being neutral.

Front

What is the pH of lemon juice?

Back

Lemon juice typically has a pH of around 2, making it acidic.

Front

Which substance is more acidic than lemon juice?

Back

Hydrochloric acid is more acidic than lemon juice.

Front

What is the only substance with a neutral pH of 7?

Back

Water is the only substance with a neutral pH of 7.

Front

What does the atomic number represent?

Back

The atomic number represents the number of protons in an atom's nucleus.

Front

How many protons does an atom with atomic number 6 have?

Back

An atom with atomic number 6 has 6 protons.

Front

What is the maximum number of electrons in the first shell?

Back

The maximum number of electrons that can be found in the first shell (energy level) is 2.

Front

What is an atom?

Back

An atom is the smallest unit of matter that retains the properties of an element.

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 the difference between atomic mass and mass number?

Back

Atomic mass is the weighted average mass of an element's isotopes, while mass number is the total number of protons and neutrons in an atom's nucleus.