Atoms, Elements and Compounds

Question 1

What is atomic structure?

Answer 1

Nucleus contains protons and neutrons protons = positive charge neutrons = no charge. Atomic number = number of protons in the nucleus of its atoms.

Question 2

Explain the arrangement of electrons in atoms.

Answer 2

Each electron in an atom is an energy level. These are represented as shells drawn as circles in a diagram. Electrons are shown by X. Electrons in the lowest energy level are in the shell closest to the nucleus.

Question 3

How do you form bonds?

Answer 3

When different elements combine they form compounds. Compounds of metals bonded to non metals have ionic bonds.

Question 4

Explain chemical equations.

Answer 4

Atoms get rearranged in chemical reactions, we write equations to represent these reactions which should be balanced.

Question 5

What are atoms, elements and compounds?

Answer 5

100 different elements - periodic table list. Each element one type of atom. Atoms represented by symbols, e.g Na = an atom of sodium O= Oxygen. Periodic table in groups with similar properties. Atoms have a tiny nucleus surrounded by electrons. Compound = 2 or more elements.