2. Atoms & Elements

Which of the following best represents the approximate mass of a proton?

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

Which of the following is the major impurity added to silicon to create n-type semiconductors?

What is the atomic number for magnesium?

How many protons are present in a neutral atom of copper (Cu)?

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

Which of the following is the smallest representative particle of an element?

Which property makes one element distinct from another?

Which of the following chemical formulas represents the main ingredient in natural gas?

Where are protons located in an atom?

How many neutrons are present in an atom of cadmium (Cd) with a mass number of 112?

Which property of an atom determines the identity of an element?

How many neutrons are present in a neutral atom of fluorine (F) with atomic number 9 and mass number 19?

Which of the following is considered the basic unit of all matter?

How many electrons does a nitrogen atom need to gain in order to fill its outer (valence) shell?