10th Grade Biology Ch. 6 Test

Which defines an atom?

• building block of energy

• building block of matter

• charged particle

• smallest particle

A charged atom that has lost or gained electrons is called a(n)

• acid

• catalyst

• ion

• isotope

An organic compound is a compound that contains

• carbon

• hydrogen

• oxygen

• sodium

Ions form when

• an atom gains neutrons

• an atom loses neutrons

• one atom gives up a proton to another atom

• one atom gives up an electron to another atom

A chemical reaction is a process by which atoms or groups of atoms in substances are

• dissolved in other substances

• ionized by the loss of protons

• mixed together with atoms in other substances

• reorganized into different substances

Which equation is balanced properly?

• $3O_2+2Al\rightarrow2AlO_3$

• $3O_2+Al\rightarrow3AlO_3$

• $4O_2+3Al\rightarrow4AlO_3$

• $4O_2+Al\rightarrow AlO_3$

Which is an example of a solute?

• soil suspended in water

• sugar that is dissolved in water

• water that dissolves salt

• water with undissolved soil

Which substance would be extensively studied during an organic chemistry course?

• glucose

• oxygen

• sodium

• water

Which is true in a covalent bond

• The bond forms between ions

• The bond forms when electrons are shared

• The bond holds atoms weakly

• The bond is caused by van der Waals forces

Elements are placed into the same period on the periodic table of the elements because they

• form the same type of chemical bonds

• form the same type of isotopes

• have the same chemical properties

• have the same number of electron energy levels