2. Atoms & Elements

What is the atomic number of an ion with a +1 charge that contains 18 electrons?

Which of the following models correctly represents a lithium atom?

Which of the following elements has more protons in its nucleus?

Copper is an element with 29 protons in its nucleus. What is the atomic number of copper?

Which statement is true of atoms?

How many protons are present in a neutral atom of aluminum?

Which subatomic particles are found in the nucleus of an atom?

Which of the following determines the identity of an atom?

Which of the following is closest to the mass of a proton?

Essentially all the elements heavier than iron in our galaxy were formed:

Why do atoms have no overall charge?

An atom has a mass number of 27 and 14 neutrons. What is the atomic number of this atom?

What is the charge of the nucleus of a copper atom?

Which two elements are the most abundant in Earth's crust?

How many protons are present in a neutral atom of bromine?