CP SEM1 EXAM_02

What three subatomic particles are atoms made up of?

• compounds, quarks, quirks

• electrons, isotopes, protons

• electrons, neutrons, protons

• isotopes, neutrons, protons

A chemical __________ is a pure substance made entirely of one type of atom.

• blend

• compound
• element
• mixture

A __________ is made of two or more atoms of different elements that are chemically combined.

• compound
• nucleus
• proton
• reaction

The main types of chemical bonds are __________.

• covalent and hydrogenated

• covalent and ionic

• fluorine and ionic

• ionic and subliminal

Which end of the water molecule has a slightly positive charge?

• both ends

• neither end

• the hydrogen end

• the oxygen end

When water molecules stick to other water molecules, this is called __________.

• adhesion
• cohesion
• polar molecule
• solution

When salt is dissolved in water, water is the __________.

• reactant
• solute
• solution
• solvent

The process that changes one set of chemicals into a new set of chemicals is called a __________.

• chemical reaction
• physical reaction
• replacement reaction
• synthetic reaction

The energy needed to start a reaction is called the __________.

• activation energy
• promoting energy
• reacting energy
• starting energy

What is a substance called if it speeds up a chemical reaction?

• catalyst
• fragile
• reusable
• specific