McG Chemistry Midterm 2020

The majority of elements on the periodic table are

• man made.
• nonmetals.
• metals.
• gases.

A cube has a volume of 8.0cm³ and a mass of 21.6g. What is the density of the cube in grams per cubic centimeters. 

• 2.7
• .37
• 2.70
• 0.370

In the modern periodic table elements are arranged by:

• atomic mass
• atomic number
• valence electrons
• number of isotopes

An element with a mass number of 11 and an atomic number of 5 has how many neutrons?

• 11
• 5
• 6
• 16

Tags

NGSS.MS-PS1-1

An atom has 10 protons, 15 neutrons and 10 electrons what is its mass number.

• 20
• 10
• 5
• 25

Tags

NGSS.MS-PS1-1

Which two subatomic particles make up the nucleus of an atom?

• Protons and Electrons
• Neutrons and Electrons
• Electrons and Protons
• Protons and Neutrons

Tags

NGSS.MS-PS1-1

which atom has a nucleus that contains 13 proteins and 14 neutrons?

• Mg

• Be

• Al

• N

Which part of the atom is overall positive?

• electrons

• first shell

• valence shell

• the nucleus

which particles have about the same mass?

• proton & neutron

• proton & electron

• neutron & electron

• neutron & positron

One example of a physical change is

• Burning paper

• Baking cookies

• Heating table sugar

• Dissolving salt in water