Phase Changes & The Periodic Table

What is the most abundant element in the Universe?

• Hydrogen

• Helium

• Carbon

• Gold

The Periodic Table of the Elements was first introduced in the 19th century. By whom?

• Abraham Lincoln

• Dmitri Mendeleev

• Albert Einstein

• Marie Curie

What is the atomic number of oxygen?

• O

• 8

• 15.999

H, C, N, O are the symbols of Hydrogen, Carbon, Nitrogen, and Oxygen, respectively. These elements are considered as:

• Metals

• Nonmetals

• Transition Metals

• Alkali Metals

What state of matter is pictured?

• Solid

• Liquid

• Gas

What temperature is a measure of? Choose the most accurate answer.

• Average kinetic energy of particles

• Average elastic energy of particles

• Heat

When the temperature increases, the particles...

• speed up and move closer together

• speed up and move farther apart

• slow down and move closer together

• slow down and move farther apart

How would you describe best the motion of particles in a solid?

• particles in solids are moving freely around each other.

• particles in solids have no motion.

• particles in solids are vibrating in place.

During which of the following phase changes is heat energy absorbed by the particles?

• liquid to gas

• gas to solid

• liquid to solid

Is the total number of atoms changing over a phase change (change of state)?

• Yes

• No