Chemistry Exam

Front

Who proposed the atomic model where electrons orbit the atom like planets orbit the sun?

Back

Bohr

Front

How many protons does an atom with atomic number 6 have?

Back

6

Front

What is the mass number of an atom with 3 protons and 4 neutrons?

Back

7

Front

What type of chemical reaction is represented by the equation CUO + CO2 → CuCO3?

Back

Synthesis

Front

What is 98.907 rounded to 1 significant figure?

Back

100

Front

What is the definition of an atom?

Back

The smallest unit of a chemical element, consisting of a nucleus surrounded by electrons.

Front

What is the difference between atomic number and mass number?

Back

Atomic number is the number of protons in an atom, while mass number is the total number of protons and neutrons.

Front

What is a chemical reaction?

Back

A process that involves the rearrangement of the molecular or ionic structure of a substance.

Front

What is the law of conservation of mass?

Back

In a chemical reaction, mass is neither created nor destroyed.

Front

What is a covalent bond?

Back

A chemical bond that involves the sharing of electron pairs between atoms.