CHS Dec '24 Atomic structure Practice

Front

What is the atomic number of an element?

Back

The atomic number is the number of protons in the nucleus of an atom, which determines the element's identity.

Front

How many protons does an element with an atomic number of 33 have?

Back

33 protons.

Front

What is the mass number of an atom?

Back

The mass number is the total number of protons and neutrons in the nucleus of an atom.

Front

If an atom has 9 protons, what is its atomic number?

Back

The atomic number is 9.

Front

What is the relationship between atomic number and protons?

Back

The atomic number is equal to the number of protons in an atom.

Front

How do you calculate the mass number of an atom?

Back

Mass number = Number of protons + Number of neutrons.

Front

What is the mass number of an atom with 4 neutrons and 4 protons?

Back

Mass number = 4 protons + 4 neutrons = 8.

Front

What does the term 'amu' stand for in atomic mass?

Back

'amu' stands for atomic mass unit, a standard unit of mass that quantifies mass on an atomic or molecular scale.

Front

If an element has a mass number of 67 and an atomic number of 33, how many neutrons does it have?

Back

Neutrons = Mass number - Atomic number = 67 - 33 = 34 neutrons.

Front

What is the significance of the atomic number in the periodic table?

Back

The atomic number determines the position of an element in the periodic table and its chemical properties.