Chem Midterm Review 1

What is the atomic number?

• the number of protons
• the number of protons and neutrons
• the number of neutrons
• the number of protons and electrons

Which particle has a positive charge?

• electron
• orbital
• proton
• neutron

The atomic number of Titanium (Ti) is

• 22

• 23

• 20

• 24

The measure of how much space an object takes up is the _____.

• Matter
• Mass
• Volume
• Density

If you wanted to find the volume of a gummy bear, what method or tool would you use?

• Ruler
• Wooden blocks
• Water displacement
• Eat as many as you can, compare to the volume of your stomach 

What is the volume of Object X?

• 10.0 cm³
• 15.0 cm³
• 20.0 cm³
• 25.0 cm³

The ability of an atom in a molecule to attract electrons is best quantified by the ______.

• electronegativity

• paramagnetism

• diamagnetism

• electron change-to-mass ratio

• first ionization energy

All isotopes of hydrogen contain

• one neutron.

• two electrons.

• one proton.

• two nuclei.

Isotopes are atoms of the same element that have different

• principal chemical properties.

• masses.

• numbers of protons.

• numbers of electrons.

In an atom, an orbital represents

• the most probably location of a proton

• the most probable location of an electron

• the least probably location of a neutron

• photons emitted as electrons move to lower energy levels