H Chemistry S1 Review (Units 1-2)

Front

What is the atomic number of an element?

Back

The atomic number is the number of protons in the nucleus of an atom, which determines the element's identity.

Front

What is the relationship between protons and electrons in a neutral atom?

Back

In a neutral atom, the number of protons equals the number of electrons.

Front

Define atomic radius.

Back

Atomic radius is the distance from the nucleus of an atom to the outermost shell of electrons.

Front

Which element has the largest atomic radius: Neon, Sodium, Magnesium, or Aluminum?

Back

Sodium has the largest atomic radius among these elements.

Front

What is an ion?

Back

An ion is an atom or molecule that has a net electrical charge due to the loss or gain of one or more electrons.

Front

What does isoelectric mean?

Back

Isoelectric refers to different species (atoms, ions, or molecules) that have the same number of electrons.

Front

What is the charge of a calcium ion (Ca²⁺)?

Back

The charge of a calcium ion (Ca²⁺) is +2, indicating it has lost two electrons.

Front

How do you determine the net charge of an atom?

Back

The net charge of an atom is determined by subtracting the number of electrons from the number of protons.

Front

What is the relationship between frequency and wavelength in electromagnetic radiation?

Back

Frequency and wavelength are inversely proportional; as one increases, the other decreases.

Front

Define electromagnetic radiation.

Back

Electromagnetic radiation is a form of energy that travels through space at the speed of light and includes visible light, radio waves, X-rays, and more.