Year 9 Science: Properties of Materials

Front

What does the Periodic Table organize?

Back

The first 20 elements according to their atomic structure, with each element having a distinct symbol.

Front

How does atomic mass change across a period in the Periodic Table?

Back

Atomic mass generally increases from left to right across a period and from top to bottom within a group.

Front

What is an atomic number?

Back

The atomic number indicates the number of protons in an atom's nucleus.

Front

What is the mass number?

Back

The mass number represents the total number of protons and neutrons in an atom's nucleus.

Front

What charges do protons, electrons, and neutrons carry?

Back

Protons carry a positive charge, electrons carry a negative charge, and neutrons have no charge.

Front

Why are atoms electrically neutral?

Back

Atoms are electrically neutral because they have an equal number of protons and electrons.

Front

What is the electronic structure of lithium?

Back

The electronic structure of lithium is 2,1.

Front

What is the maximum number of electrons the first shell can hold?

Back

The first shell can hold a maximum of 2 electrons.

Front

What is the electronic structure of sodium?

Back

The electronic structure of sodium is 2,8,1.

Front

What is the trend in melting points of Group 1 metals as you move down the group?

Back

The melting points of these elements decrease as we go down the group.