7th Grade Physical Sci Periodic Table and Bonds Quiz

Thorium (Th) has an atomic number of 90. How many electrons does it have?

• 142

• 232

• 90

• 322

Which part of the atom is not found in the nucleus?

• electrons

• protons

• neutrons

• valence electrons

What is the system of electrons surrounding the nucleus of an atom?

• valence electrons

• nucleus

• electrons

• electron cloud

What is the combined mass of all protons and neutrons of an atom?

• atomic mass

• subatomic particles

• atomic number

• nucleus weight

In the modern periodic table, which of the following describes atoms with similar chemical behavior and properties?

• They have similar atomic masses

• They are located in the same group

• They are located in the same period

• They have the same number of isotopes

Using the periodic table, which of the following pairs of elements should you expect to have the most similar properties?

• Aluminum (Al) and Silicon (Si)

• Sulfur (S) and Selenium (Se)

• Sodium (Na) and Nitrogen (N)

• 
  Hydrogen (H) and Helium (He)

Which of the following statements about atoms is true?

• They are the same for all elements

• They are both stable and nonradioactive

• They arranged in the periodic table according to number of protons

• They are made up of protons and electrons in a nucleus surrounded by orbiting neutrons

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-5

What is the number of protons in the nucleus of an atom that determines the chemical properties of an atom?

• mass number

• atomic mass

• atomic number

• atomic symbol

Carbon is a neutral element with an atomic number of 6. How many electrons does it have?

• 12

• 6

• 18

• 2

Tags

NGSS.MS-PS1-1

If an element has 8 protons, 8 neutrons, and 9 electrons. What is the elements atomic mass?

• 8

• 16

• 17

• 9