The periodic table quiz for science.

What are the general properties of metals?

• Metals are poor conductors of heat and electricity.
• Metals are always brittle and dull.
• Metals have low density and are non-malleable.
• Metals are good conductors of heat and electricity, malleable, ductile, lustrous, and have high density.

what are general properties of nonmetals

• Nonmetals are generally poor conductors, dull, unmalleable

• Nonmetals tend to lose electrons easily.
• Nonmetals always exist as solids at room temperature.
• Nonmetals are excellent conductors of electricity.

what are general properties of metalloids?

• Metalloids are excellent conductors of electricity.
• Metalloids have no luster and are always gases at room temperature.
• Metalloids are semiconductors, have metallic luster, and exhibit mixed chemical properties.

• Metalloids are always ductile and malleable.

what atoms are these and how many H2O

• 2 H atoms and 2 O atoms per H2O molecule.
• 1 H atom and 1 O atom per H2O molecule.
• 2 H atoms and 1 O atom per H2O molecule.
• 3 H atoms and 2 O atoms per H2O molecule.

Tags

NGSS.MS-PS1-1

what are the three bonds used to form compounds and mixtures

• Ionic bonds, covalent bonds, metallic bonds
• Dipole-dipole interactions
• Van der Waals forces
• Hydrogen bonds

what are metallic bonds

• Metallic bonds involve the sharing of electrons between two metals or more

• Metallic bonds are the result of ionic interactions between metals.
• Metallic bonds are formed between non-metal atoms.
• Metallic bonds are the attraction between metal ions and delocalized electrons.

what are covalent bonds

• Covalent bonds are chemical bonds formed by the sharing of electron pairs between atoms that are only nonmetal

• Covalent bonds only occur in ionic compounds.
• Covalent bonds are weak attractions between molecules.
• Covalent bonds are formed by the transfer of electrons between atoms.

what are ionic bonds

• Ionic bonds occur only in metals and do not involve nonmetals.
• Ionic bonds are formed by sharing electrons between atoms.
• Ionic bonds are chemical bonds formed through the electrostatic attraction between metal and nonmetals

• Ionic bonds are weak attractions between neutral molecules.

what is the difference between a mixture and a compound

• mixtures are not chemically combined and compounds are, mixture have no definite ratio of elements while compounds do.

• A mixture can only be made of solids, while a compound can be made of liquids and gases.
• A mixture has a fixed composition, while a compound retains the properties of its components.
• A mixture is always homogeneous, while a compound is always heterogeneous.

what are ways to seperate a mixture

• Sifting, crushing, blending
• Heating, cooling, mixing
• Dissolving, freezing, solidifying
• Filtration, distillation, evaporation, centrifugation, magnetic separation.