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QUESTION 64 F. The compound, BF3, has the Lewis structure as shown below: O TRUE O FALSE QUESTION 65 The Lewis structure for NH3 is: O H-N-H H O...
Which of the following statements about subatomic particles best characterizes electrons?
- positive charge, light, circling the nucleus
- no charge, heavy, found in the nucleus
- negative charge, light, circling the nucleus
- negative charge, heavy, circling the nucleus
Henry Moseley determined that, with a few exceptions, the order of increasing atomic number is the same as increasing atomic mass.
Who was responsible for recognizing that the periodic table explained trends best when organized in order of atomic number?
- Dmitri Mendeleev
- Henry Moseley
- JJ Thomson
- Ernest Rutherford
Which selection contains elements that are all in the same period?
- Rb, Sr, La, Zr
- Al, Ga, Si, P
- N, O, Cl, Br
- Hg, Tl, Pb, Bi
Generally, when going from left to right across a period on the periodic table:
- atomic radii decrease
- ionic radii increase
- electronegativity decreases
- valence electron number decreases
Generally, when going down columns 1 or 2 of the periodic table, the reactivity of elements:
- remains the same except for noble gases
- remains the same except for halogens
How many valence electrons are contained in Na, Mg, and Al respectively?
- 1, 2, 3
- 7, 6, 5
- 9, 8, 7
- 11, 12, 13
How many valence electrons are contained in N, O, and F, respectively?
- 5, 6, 7
- 7, 8, 9
- 3, 2, 1
- 14, 15, 18
The chemical symbol Si stands for silicone.
Question 41The chemical symbol for potassium is P.
The element, boron, is represented by which of the following chemical symbols?
The chemical symbol, Na, represents the element:
The element, tungsten, is represented by which of the following chemical symbols?
Ions form when atoms gain or lose protons.
The proper name for Cu1+ is copper (I) ion.
Which of the following describes the anion in the compound MgO?
Which of the following describes the specific copper ion in the compound, CuCl?
- Cupride ion
- Copper (I) ion
- Copper (II) ion
- Cupride (I) ion
What is the charge of a potassium ion?
What is the charge of a sodium ion?
The name for the formula MgI2 is magnesium diiodide.
The proper name for CH4 is monocarbon tetrahydride.
The formula for silicon dioxide is:
The proper name for VO2 is:
- Vanadium oxide
- Vanadium (II) oxide
- Vanadium (I) oxide
- Vanadium (IV) oxide
The proper name for MnO is:
- Magnesium oxide
- Magnesium (II) oxide
- Manganese oxide
- Manganese (II) oxide
The proper name for C2H6 is:
- Carbon hydride
- Dicarbon heptahydride
- Dicarbon tetrahydride
- Dicarbon hexahydride
The sharing or transferring of outer valence electrons between atoms results in a chemical bond.
The bond exhibited between oxygen and hydrogen is an example of an ionic bond.
Question 59The bond exhibited between two fluorine atoms is an example of an ionic bond.
Which of the following pairs of atoms exhibit an ionic bond?
- H and S
- Fe and O
- C and F
- C and N
Which of the following pairs of atoms do NOT exhibit an ionic bond?
- Cl and Al
- Cl and B
- Ca and F
- Rb and S
Which of the following pairs of atoms do NOT exhibit a covalent bond?
- Cs and F
- O and O
- S and O
- P and Cl
The Lewis structure of HCl has a double-bond.
The compound, BF3, has the Lewis structure as shown below:
65, 66, 67, 68, 69 are pictured
Which functional groups are involved in an amino acid?
- Attachment 1
- Attachment 2
- Attachment 3