Quiz 11- All Quizzes Flashcards
The formation of ions typically occurs when
A) nonmetal atoms lose electrons and metals gain them
B) metal and nonmetal atoms are close together in the number of valence electrons
C) metal and nonmetal atoms have the same number of electrons
D) nonmetal atoms gain electrons and metal atoms lose them.
Answer: D
Generally, the octet rule works fairly well for predicting the behavior of atoms. However, there is an exception:
A) The halogens do not form ions on the bases of the octet rule.
B) The alkali metals only conform to the octet rule when producing neutral atoms.
C) The transition metals do not necessarily conform to the octet rule.
D) The nonmetals do not conform to the octet rule.
Answer: C
A compound is:
A) Two or more elements well mixed
B) Two or more elements combined chemically
C) Two or more elements carrying a positive charge
D) a physical blend of two or more elements
Answer: B
The difference between an ionic bond and s covalent bond is that
A) Ionic bonds commonly occur between two metals and covalent bonds occur between metals and nonmetals
B) ionic bonds are between atoms that can share electrons; covalent bonds are between atoms that will donate/accept electrons
C) covalent bonds come about because of sharing electrons;ionic bonds do not
D) ionic bonds are between smaller atoms; covalent bonds are between large atoms.
Answer:C
When considering the octet rule, the explanation of the O^2- ion is
A) a loss of two electrons to get closer to 8 in the energy level.
B) when an oxygen atom gains two electrons, it has the same electron arrangement as neon, an inert gas.
C) Oxygen’s nuclear charge of 8 can only hold 8 electrons in the outer shell.
D)Oxygen is an exception to the octet rule.
Answer:B
How many electrons are contained in sulfide ion? A) 18 B) 14 C)30 D)16
Answer:A
What is the correct name of the compound Cl2O3? A) dichlorine trioxide B) Chlorine oxide C) Chlorine trioxide D) Chloride Oxide
Answer:A
The name of the compound Na2CO3 is A) sodium carbonate B) disodium carbonate C) sodium bicarbonate D) disodium bicarbonate
Answer:A
Which of the following is an ionic compound? A) CS2 B) CO2 C) Mg(OH)2 D) CH4
Answer: C
Choose the formula of cobalt (II) nitrate. A) CoN B) Co2 NO3 C) Co(NO3)2 D)Co(II)(NO3)2
Answer:D
What is the molar mass of magnesium chloride? A) 59.80 g/mol B) 90.40 g/mol C) 95.30 g/mol D) 125.90 g/mol
Answer:C
Calculate the mass of 10.00 moles of Nickel (II) cyanide, NI(CN)2. A)847.0 grams B) 987.0 grams C) 1107 grams D)2694 grams
Answer:C
The conversion of a solid directly into a gas is called A) vaporization B) deposition C) sublimation D) melting
Answer:C
Liquids have_ shape and_ Volume A) fixed/variable B) fixed/fixed C) variable/fixed D) variable/Variable
Answer:C
Which of the following is a chemical change? A) evaporation of water B) melting of copper C) tearing paper D) frying an egg
Answer:D
The number 390000, expressed correctly in scientific notation, is_ A) 3.9 x 10^-6 B)3.9 x 10^5 C) 3.9 D) 3.9 x 10^-5
Answer: B
2.32 g is the same as A) 232 kg B) 23.2 cg C) 2320 mg D) 0.0232 dg
Answer: C
Mg has how many protons, neutrons, and electrons?
A) 12 protons, 23 neutrons, and 23 electrons
B) 12 protons, 11 neutrons, And 11 electrons
C) 23 protons, 11 neutrons, and 23 electrons
D) 12 protons, 11 neutrons, and 12 electrons
Answer:D
Which of the following is the correct order of elements in increasing atomic radius: K,Mg,B?
A) K< Mg<b></b>
Answer:B
Radioisotopes with short half- lives are used in diagnostic tests because
A) They have high energy
B) they are inexpensive
C) they do not pose health risks by being present long after use.
D) they have less penetration ability
Answer:C