Understanding Atoms

An atom is -

• a type of energy wave that travels through space

• a large particle made up of multiple molecules

• a type of molecule found only in living organisms

• the basic building blocks of matter

All the atoms of a given element are identical in that they have the same number of protons.

• TRUE

• FALSE

According to the chart on Elements' Atomic Radius, which element is the largest?

• He (He)

• Ne (Neon)

• Cs (Cesium)

• Be (Berylium)

The rows on the periodic table go horizontally across. Using this chart, which row has the smallest sized elements?

• Row 1, that has H and He

• Row 2, that has Li, Be, B, C, N, O, F and Ne

• The size of the elements can not be determined using this chart

• Row 6, the first element in this row is Cs (Cesium)

Where did the word "atom" come from?

• It was invented by Albert Einstein in the 20th century

• It comes from the Greek philosopher Democritus, meaning "indivisible"

• It was first used by Isaac Newton in his scientific writings

• It originates from Latin, meaning "small particle"

What are the main three parts of an atom?

• Proton, Neutron, Electron

• Nucleus, Molecule, Ion

• Electron, Photon, Neutrino

• Proton, Atom, Cell

What is in the nucleus of an atom?

• Electrons and Protons

• Protons and Neutrons

• Neutrons and Electrons

• Protons, Neutrons, and Electrons

What would happen if an atom gained or lost an electron?

• It would become a different element

• It would turn into a neutron

• It would become an ion

• It would cease to exist

Which of the following statement is true about the atoms of any element?

• 1. The number of protons in an atom of an element is unique to each element.

• 1. The number of neutrons in an atom of an element is the same for all elements.

• 1. All elements have the same number or neutrons as protons.

1. Which of the following statements explains why atoms are always neutral in charge?

• 1. They have the same number of protons as electrons.

• 1. They have the same size as the atoms of all other elements.

• 1. They have protons that are identical to the protons of all other elements.

• 1. They have the same number of protons as the atoms of all other elements.