Which substance contains bonds that involved the transfer of electrons from one atom to another? (1) CO2 (3) KBr (2) NH3 (4) Cl2
Which best explains why a crystal is incompressible? A.Its molecules remain in position without vibrating. B.The molecules of a crystal behave like those of a gas. C.There is little, if any, space left between its adjacent molecules. D.Its molecules switch positions when they are compressed.
1. Which of the following occurs in an ionic bond? •oppositely charged ions attract. •two atoms share two electrons. •two atoms share more than two electrons. •like-charged ions attract. 2. Which pair of elements is most likely to form an ionic bond? •hydrogen and helium •lithium and potassium •potassium and iodine •iron and zinc 3. Ionic compounds are normally in which physical state at room temperature? •solid •liquid •gas •plasma
Which of the following is a possible Noble gas notation? [Xe] 6s26p6 [Kr] 5s25d85p6 [Xe] 6s25d106p4 [Kr] 5s24d105p6
Which of the following mining types can be used to obtain uranium? a. open pit b. underground c. solution d. all of the above
The formation of which product(s) will most likely be observed in a combustion reaction? A. an oxide B. one element and one compound C. an element D. two ionic compounds
Which of these refers to atoms with the same atomic number but different atomic masses? a.These atoms are isotopes. c.These atoms are different elements. Which of these refers to atoms with the same atomic number but different atomic masses? a.These atoms are isotopes. b.These atoms have different numbers of electrons. c.These atoms are different elements. d.These atoms have different numbers of protons. These atoms are isomers. Follow 3 answers 3 Report Abuse Are you sure you want to delete this answer? Yes No; These atoms are isomers.
The standard on which the atomic mass unit is based is the mass of a A. proton. B. neutron. C. chlorine-35 atom. D. carbon-12 atom.
Based on their descriptions, classify these chemical changes as endothermic or exothermic. 1) A chemical change takes place in a container, making it feel cold to touch. 2) Burning wood 3) A chemical change takes place in a container, making it feel hot to touch. 4) Pocket hand warmers(used by skiers) start out at room temperature. When you open the air tight packaging, a substance reacts with air, and it quickly begins to feel hot. 5) A "cold pack" (used for sport injuries) starts out a room temperature. But when you squish the liquid around, you cause two substances to mix that were originally kept separate. Those substances react and the pack begins to feel cold.
A narrow channel or slab of a mineral that is different from the surrounding rock is called a a. vein. b. solution. c. crystal. d. metal.
Which products would form if chlorine gas was bubbled through a solution of sodium bromide? Na and BrCl Na and BrCl2 NaCl and Br2 Na(Cl)2 and Br2
Compared to pure water, an aqueous solution of calcium chloride has a (1) higher boiling point and higher freezing point (2) higher boiling point and lower freezing point (3) lower boiling point and higher freezing point (4) lower boiling point and lower freezing point
Which is a property of most nonmetallic solids? (1) high thermal conductivity(2) high electrical conductivity(3) brittleness(4) malleability
Which of the following types of mixtures exhibit the Tyndall effect? a. solutions c. colloids b. suspensions d. none of the above
Which is the noble-gas notation for lead (Pb)? [Rn]6s24f145d106p2 [Rn]6s25d106p2 [Xe]6s24f145d106p2 [Xe]6s25d106p2
What is the shape of the molecule shown in the image? A bent B tetrahedral C trigonal pyramid D linear Download png