2. Atoms & Elements

Which statement correctly describes the location and charge of the electrons in an atom?

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

When the proton number and electron number are unequal, the atom or molecule:

Which of the following correctly describes an atom with 8 protons, 9 neutrons, and 10 electrons?

Which element has exactly 14 protons in its nucleus?

In the context of atomic structure, which subatomic particle determines the identity of an element?

Which subatomic particle has a negative charge and is found outside the nucleus of an atom?

How many electrons are present in a neutral atom of lithium-6 (6Li)?

How many protons are present in the nucleus of a beryllium (Be) atom?

An iron nail is made up of particles. Which statement is true about these particles?

Which of the following best describes how the inner electron shells of an atom differ from the outer electron shells?

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?