Test: Chemistry of Life

Positively-charged particles located in the nucleus are known as—

• protons
• neutrons
• electrons
• isotopes

Tags

NGSS.HS-PS1-8

In a neutral atom the number of protons must equal the number of—

• protons
• electrons
• neutrons
• ions

Tags

NGSS.HS-PS1-7

According to the diagram below, sodium has—

• 11 protons
• 11 neutrons
• 23 protons
• 23 neutrons

Tags

NGSS.HS-PS1-1

The number that ALWAYS gives you the total number of protons in an atom is the—

• mass number
• atomic number
• electron number
• charge

Tags

NGSS.HS-PS1-7

Which of the following describes a physical property?

• mass
• reactivity
• combustibility
• flammability

C-12 and C-14 differ in the number of neutrons but the same number of protons in the nucleus. They are both—

• ions
• atoms
• isotopes
• elements

Which of the following is an element?

• H2O
• salt in water
• Na
• HCl

Which of the following is a solution?

• H2O
• sugar in water
• sand in water
• oil in water

Tags

NGSS.HS-ESS2-5

A chemical bond in which electrons are transferred is called a(n)—

• ionic bond
• covalent bond
• polar bond
• hydrogen bond

Which of the following is NOT an indicator that a chemical reaction has occurred?

• color change
• phase change
• temperature change
• gas produced

Tags

NGSS.MS-PS1-2