Fall Semester Exam 24-25

Front

What is electromagnetic radiation?

Back

Electromagnetic radiation is a form of energy that travels through space at the speed of light and includes a range of waves such as radio waves, microwaves, infrared, visible light, ultraviolet, X-rays, and gamma rays.

Front

What is the relationship between wavelength and energy in electromagnetic waves?

Back

Electromagnetic waves with shorter wavelengths have higher energy, while those with longer wavelengths have lower energy.

Front

What is the formula for titanium(II) oxide?

Back

TiO

Front

What is the atomic radius?

Back

The atomic radius is a measure of the size of an atom, typically the distance from the nucleus to the outermost shell of electrons.

Front

How does the atomic radius change across a period in the periodic table?

Back

The atomic radius generally decreases across a period from left to right due to increasing nuclear charge, which pulls electrons closer to the nucleus.

Front

How does the atomic radius change down a group in the periodic table?

Back

The atomic radius generally increases down a group due to the addition of electron shells.

Front

What is the correct name for N₂O₃?

Back

Dinitrogen trioxide.

Front

What is the average atomic mass?

Back

The average atomic mass is the weighted average of the masses of an element's isotopes, measured in atomic mass units (amu).

Front

What is the significance of the atomic mass of titanium?

Back

The atomic mass of titanium is important for understanding its behavior in chemical reactions and its applications in materials science.

Front

What is the formula for calculating average atomic mass?

Back

Average atomic mass = (mass of isotope 1 × relative abundance) + (mass of isotope 2 × relative abundance) + ...