2024 Chem Sem 1 Part 1 no quantum, history

Front

Which color has the least amount of energy?

Back

Red has the least amount of energy in the visible spectrum.

Front

Density is measured in:

Back

Density is measured in grams/mL.

Front

True or False: The frequency of the blue line is greater than the frequency of the red line.

Back

True. Blue light has a higher frequency than red light.

Front

Do the following atoms belong to the same element? Aluminum-27 and an atom with 14 protons and 13 neutrons.

Back

No, because they have different numbers of protons.

Front

How can salt water be separated?

Back

Salt water can be separated by evaporation.

Front

What is the definition of density?

Back

Density is the mass of an object divided by its volume.

Front

What is the relationship between wavelength and energy?

Back

Shorter wavelengths correspond to higher energy.

Front

What is the atomic number?

Back

The atomic number is the number of protons in the nucleus of an atom.

Front

What is the principle of conservation of mass?

Back

The principle states that mass is neither created nor destroyed in a chemical reaction.

Front

What is an element?

Back

An element is a pure substance that cannot be broken down into simpler substances by chemical means.