2. Atoms & Elements

Which of the following best describes the structure of an atom?

Which phrase best describes an atom?

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

Which subatomic particle is responsible for the chemical properties of an atom?

Which element has 16 protons in its nucleus?

Which of the following is the smallest unit of an element that retains the chemical properties of that element?

How many oxygen atoms are present in a single molecule of water (H_2O)?

How many electrons are present in a neutral atom of tin (Sn)?

Which part of an atom accounts for most of its volume?

Which of the following statements about atoms is true?

Given the representation of a chlorine atom as 35Cl , how many neutrons are present in this atom?

Compared to an atom as a whole, an atomic nucleus is:

Which of the following best describes atoms?

How many protons are present in a nitrogen atom with a 3- charge?

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