EOC Physical Science

Adding or subtracting neutrons changes the atom into an (a)   .

• ion
• isotope
• neutral atom

Arjun is studying the periodic table and wonders what determines the atomic number of an element?

• The total number of neutrons and protons

• The number of electrons

• The number of protons

• The number of neutrons

How many protons does this isotope of titanium have?

• 48
• 22
• 26
• 70

What is the maximum number of electrons in the second shell (ring)?

• 8

• 18

• 2

• 32

Emma is working on a chemistry project about elements and their properties. She needs to know: How many valence electrons does Bromine (Br) have for her project?

• 5

• 6

• 7

• 8

All elements found on the left side of the Periodic Table of the Elements have what properties in common?

• They conduct heat and electricity 
• They are all gases 
• They are brittle and dull
• They are radioactive

Match the following sets of elements with the description of their properties.

• A set of elements that are all metals but belong to different groups.

• He, Ne, Ar

• A set of elements that are all halogens.

• H, C, I

• A set of elements that are all noble gases.

• Na, Ca, Al

• A set of elements that includes a noble gas, a nonmetal, and a metal.

• He, H, Al

As you move down a group in the periodic table, the atomic size increases. This is because ____________.

• The nuclear charge decreases.

• Electrons are added to the same energy level.

• More electron shells are added.

• The shielding effect decreases.

In a science class, James, Hannah, and Luna are discussing the conductivity of different materials. Which type of element do they conclude is the least conductive?

• metal

• metalloid

• non-metal

During a science fair, Benjamin is explaining to Mason and Grace about different materials used in electronics. He asks, 'Which kind of element is called a semi-conductor?'

• metals

• metalloids

• non-metals