CBA #1

What subatomic particles are found in the nucleus?

• Neutrons and Protons

• Electrons

• Protons and Electrons

If an element is more reactive it is located on which side of the periodic table?

• Left

• Right

Where is the mass located?

• Nucleus

• Electron cloud

Where are valence electrons? (1A-8A)

• innermost ring on electron cloud

• outermost ring on electron cloud

• nucleus

How do you find density of a regular object?

• m x v

• m / v

• d x m

How do you find the water displaced in a density problem?

• final volume - initial volume

• initial volume - final volume

• mass x density

How many protons, neutrons, and electrons are present in an atom of Zinc, Zn, with a mass number of 65?

• 30 protons, 65 neutrons, 30 electrons

• 30 protons, 35 neutrons, 30 electrons

• 30 protons, 30 neutrons, 30 electrons

• 20 protons, 20 neutrons, 20 electrons

A model of a Potassium atom is shown. What types of particles are found in the atom's nucleus?

• Positively charged particles and negatively charged particles

• Negatively charged particles only

• Neutral particles and positively charged particles

• Positively charged particles only

The atoms of a certain element each contain 8 protons and 6 valence electron. Which statement correctly identifies this element and describes its chemical reactivity?

• The element is oxygen, and is highly reactive.

• The element is calcium, and is not very reactive.

• The element is oxygen, and is not very reactive.

• The element is calcium, and is very reactive.

Which two elements on periodic table are in the same period?

• F and Cl

• Na and S

• Se and Te

• Cs and Zr