Midterm Prep #1

Front

What is the atomic number of Chlorine?

Back

17

Front

How many protons does Chlorine have?

Back

17

Front

How many neutrons does Chlorine have if its mass number is 35?

Back

18

Front

What does it mean for a measurement to be precise but not accurate?

Back

It means the measurements are close to each other but not close to the true value.

Front

What is the definition of significant figures?

Back

Significant figures are the digits in a number that contribute to its precision.

Front

How do you round the number 0.035550 g to two significant figures?

Back

0.036

Front

What is the principle of conservation of mass in a chemical reaction?

Back

The total mass of reactants equals the total mass of products.

Front

What is the percentage composition of CuCl2?

Back

47.27% Cu, 52.73% Cl

Front

What is the definition of potential energy?

Back

Potential energy is the energy stored in an object due to its position or arrangement.

Front

What direction do atoms naturally move in terms of potential energy?

Back

Toward low potential energy.