Energy

Energy

Multiple Select

Which of the following are elements?

• H₂O

• Ca

• Cl

• K

• HCl

Multiple Choice

Which of the following are Compounds?

• C₆H₁₂O₆

• Rb

• Na

• NaCl

• C₇H₁₄

Multiple Choice

An element ____.

• a.

  can combine with

  protons to make an atom

• b.

  is made up of compounds

• can combine with one or more other elements to make a compound

• is defined by the

  number of electrons it has

• is an atom or group of atoms with a charge

Multiple Select

Which of the following are ions

• Na

• Na⁺

• Fl^-

• Ca²⁺

• C

Multiple Choice

An acidic solution has....

• more hydroxide ions than hydrogen ions and a pH greater than 7

• more hydrogen ions than hydroxide ions and a pH greater than 7

• more hydroxide ions than hydrogen ions and a pH less than 7

• more hydroxide ions than hydrogen ions and a pH of 7

• more hydrogen ions than hydroxide ions and a pH less than 7

Multiple Choice

If a carbon atom combines with oxygen atoms to form CO₂, this would be described as ____.

• a.

  a physical change

• a chemical change

• both a physical and chemical change

• first a physical

  change and then a chemical change

• neither a physical change nor a chemical change

Multiple Choice

. Matter is best described as ____.

• a.

  thermodynamic

• something that has the

  capacity to do work

• positively charged

• something that can produce change

• anything that has mass

  and takes up space

Multiple Choice

An atom’s mass number is equal to the total number of ____.

• neutrons and isotopes

• neutrons and electrons

• c.

  neutrons and protons

• protons, neutrons, and electrons

• protons only