2. Atoms & Elements

Which of the following best describes the ground state of an atom?

How many electrons does a neutral atom of zinc contain?

How many electrons are present in a neutral atom of potassium (K)?

What is the smallest unit of gold that retains the chemical properties of gold?

The discovery of the electron as a subatomic particle was a result of which experiment?

How many neutrons are present in a neutral atom of beryllium-9?

In a neutral atom, how many principal energy levels (shells) are possible according to the quantum mechanical model?

Which of the following atoms is NOT a component of a water molecule?

Why are atoms electrically neutral under normal conditions?

Which of the following best describes the composition of cathode rays?

Which of the following primarily determines the chemical properties of an element?

Which element is the heaviest (has the highest atomic number) that can be formed by fusion in the core of massive stars before supernova?

Which property determines the identity of an atom?

Which of the following substances is composed of only one type of atom?

When two hydrogen atoms combine with one oxygen atom, the result is a water molecule, which is a(n):