Repaso Science

the smallest part of an element; it consists of a nucleus made up of neutrons and protons, and it is
surrounded by electrons

• Element

• Molecule

• Atom

• Metals

• Non metals

a substance that cannot be decomposed into simpler substances

• Element

• Molecule

• Atom

• Metals

• Non metals

in which the elements' atoms combine by gaining or receiving electrons at their last energy level.

• Ionic bond

• Molecule

• Atom

• Metals

• Non metals

any type of chemical elements with certain characteristic properties; they are malleable and shiny
solids and in general, they are good conductors of heat and electricity

• Element

• Molecule

• Atom

• Metals

• Non metals

When one element combines with another to achieve stability,

• Element

• Molecule

• Atom

• Chemical bond

• Non metals

a group of two or more atoms joined by a covalent bond

• Element

• Molecule

• Atom

• Metals

• Non metals

chemical compound that produces hydrogen ions (H+) when dissolved in water

• Element

• Molecule

• Acid

• Metals

• Non metals

chemical compound that releases hydroxide ions (OH-) when dissolved in water

• Base

• Molecule

• Acid

• Metals

• Non metals

any of the chemical elements that are found at the top of the Periodic Table; they are
electronegative elements with a tendency to form covalent compounds or negative ions

• Element

• Molecule

• Atom

• Metals

• Non metals

group of substances made up of carbon, hydrogen, and oxygen, where energy and the
structural elements of living systems are stored; these are divided into monosaccharides [sugars] and
polysaccharides

• Carbohydrates

• Enzymes

• Lipids

• Proteins