Atoms and Molecules

Atoms and Molecules

Open Ended

Let's recall!

What is an element?

Open Ended

Write the symbols used to represent the following elements: helium, chlorine, magnesium, nitrogen, sulfur.

Open Ended

Name the atoms that have the following symbols:

Al, Br, Pb, Ag, Hg.

Open Ended

What is an atom?

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Multiple Select

Select the statements that are true.

• A proton is positively charged.

• A neutron is negatively charged.

• A neutron is neutral (no charge).

• An electron is negatively charged.

• An electron is neutral (no charge)

Multiple Select

Select the statements that are true about the mass of sub-atomic particle(s).

• The mass of electron is negligible compared to the mass of proton.

• The mass of proton is negligible compared to the mass of electron.

• The relative mass of a proton is 1.

• The neutron has the same mass as the proton.

• The number of electrons and protons contribute to the mass of the atom.

Multiple Select

Observe the diagram carefully and select the true statements.

• This atom has three protons.

• This atom has four protons.

• This atom has three neutrons.

• This atom has four neutrons.

• This atom has four neutrons.

Open Ended

Explain why this atom is electrically neutral.