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Chemistry

Ch. 4 a

QuestionAnswer
Sodium reacts with chlorine to form A) Na2Cl. B) NaCl. C) NaCl2. D) Na2Cl3. NaCl
Hydrogen and nitrogen react to form A)NH3 . B) NH4. C) NH2. D) NH. NH3
Calcium reacts with chlorine to form A) CaCl2. B) Ca2Cl. C) Ca2Cl3. D) CaCl. CaCl2
From the periodic table, the number of valence electrons for most of the main group elements may be determined directly from the A) atomic number. B) nucleon number. C) period number. D) group number. group number.
In the formula for copper(II) phosphate, the number of phosphorus atoms is A) three. B) one. C)two. D) four. two
An element with 7 electrons in its outer shell is in which group on the periodic table? A) Group 5A B) Group 6A C) Group 7A D) Group 2A Group 7A
How many dots will appear in the Lewis dot structure for an element from in Group 1A of the periodic table? A) five B) one C) four D) eight one
Chalk is primarily composed of calcium carbonate. The formula of calcium carbonate is A) Ca2CO3. B) CaCO3. C) Ca3(CO3)2. D) Ca(CO3)2. CaCO3
Sodium hydroxide is commonly known as lye. The formula of sodium hydroxide is A) NaOH. B) SOH. C) Na(OH)2. D) Na2OH. NaOH
An electron-dot structure is a convenient method of representing A) the complete electron configuration of the atom. B) core electrons of an atom. C) all electrons of the atom. D) valence electrons of an atom. valence electrons of an atom.
The number of protons in a sodium ion, Na+, is A) 23. B) 10. C) 12. D) 11. 11
What is the name of NaH2PO4? A) sodium(II) dihydrogen monophosphate B) sodium dihydrogen phosphate C) monosodium dihydrogen monophosphate D) sodium hydrogen phosphate sodium dihydrogen phosphate
The attraction between positive and negative ions is known as a(n) A) ionic bond. B) molecular bond. C) covalent bond. D) crystal bond. ionic bond
What is the formula of ammonium nitrate? A) NH4N B) NH4(NO3)2 C) NH4NO3 D) (NH4)2NO3 NH4NO3
The prefix which means seven is A) hepta. B) octa. C) hexa. D) tetra. hepta
Noble gases are unreactive because of electronic structures."if other elements could be made to achieve noble gas electronic structures they would be more stable" is called A) inductive reasoning B) logic C) critical thinking D) deductive reasoning deductive reasoning
If a central atom has four electron sets attached to it, the geometry about the central atom is A) triangular. B) pyramidal. C) linear. D) tetrahedral tetrahedral
Why do chemists useLewis symbols to represent chlorine and sodium rather than drawing the electron diagrams of each element before and after the reaction?A) Lewis symbols, abstract. B) Lewis sym., scientific. C) Lewis sym. easier D) Lewis sym., accurate Lewis sym. easier
In a molecule of nitrogen, N2, the nitrogen atoms are bonded to each other by A) an ionic bond. B) a triple covalent bond. C) a double covalent bond. D) a single covalent bond. a triple covalent bond.
Magnesium reacts with oxygen to form A) Mg3O2. B) Mg2O. C) MgO. D) MgO2. MgO.
Created by: zjoss012
 

 



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