Atoms (9th Grade)

Which statement about the atom’s nucleus is correct?

The average atomic mass of potassium is 39 g/mole.  What is the mass of 2 moles of potassium?

 According to Rutherford’s model of the atom,electrons behave like

Which one of the following statements is a part of Dalton's atomic theory?

If the average atomic mass of carbon is 12.01 g/mole, I mole of pure carbon will have a mass of

What are the major differences between Bohr’s model of the atom and the modern model

The first theory of atoms was proposed by ____________________.

Bohr’s model of the atom compares electrons to ____________________.

A mole is an SI base unit that describes the

The number of energy levels that are filled in atoms is determined by the number of___________.

Thomson discovered atoms contained negatively charged particles called ____________________.

You have 6.5 moles of chromium with a molar mass of 52 g/m. What is the total mass of chromium?

The molar mass of krypton is 83.8 g/mol.  The mass of 5 moles of krypton is __________________.

The __________________ is the SI unit that is used for counting small particles, such as atoms.

Oxygen's atomic number is 8.  This means an oxygen atom has

How is an element’s average atomic mass determined?

Isotopes of an element have the same atomic __________ but different atomic________________.

The nucleus of an atom has a____________________ electric charge.

Which statement about the modern model of the atom is not true?

An atom gains energy by absorbing a light particle called a  ____________________.