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Science 8 - Quarter 3 Matter

What are the three states of matter?

Solid, Liquid, Gas

What is the molecular arrangement of solids?

Closely packed particles

How do particles in a liquid move compared to those in a solid?

Liquids have enough space to slide past one another, while solids are tightly packed.

What is the force of attraction among particles in gases?

Weak or negligible.

Do solids have a definite shape?

Yes, solids have their own shape.

What happens to the shape of a liquid when it's placed in a container?

It takes the shape of its container.

Can solids be compressed easily?

No, they cannot be easily compressed.

Describe the compressibility of gases.

Gases can be compressed easily.

What is the process called when a solid turns into a liquid?

Melting.

What happens when you decrease the temperature of a gas?

It can trigger the phase change from gas to liquid to solid.

What is a sign of a chemical change?

Formation of gas or bubbles.

How many elements are there in the periodic table?

118 elements.

What forms when atoms of the same element combine?

Molecules.

What two elements combine to form water?

Two hydrogen atoms and one oxygen atom.

What happens during the boiling of water?

It is an example of a physical change.

What type of particle has a negative charge?

Electron.

What is electronegativity?

The ability of an element to attract electrons.

Which group of elements in the periodic table is known for being colorless and odorless?

Noble gases (Group 18 or 8A).

What do alkali metals form when they react with oxygen?

Metal oxides.

What trend occurs in ionization energy as you move across the periodic table from left to right?

Ionization energy increases.