1. Which two elements react vigorously with each other?
A: Chlorine and lithium
B:Chlorine and potassium
C:iodine and lithium
D:iodine and potassium
my answer is B
B is correct; I think A is true, also.
2. which statement about electronegativty is correct.
A: Electronegativity decrease across a period.
B:Electronegativity increasse down a group
C: Metal generally have electronegativity values than non-metal
D:Noble gases have the highest electronegativity values.
my answer is A
A is not correct. EN increases across the periodic table. For example, Na has EN = about 0.9 while F is 4.0. PRABABLY C is th correct answer but you didn't write all of the answer but I suspect the word "lower" was omitted after values and before than. As it stands, none are correct.
4.Which statement is correct for a periodic trend?
A: Ionization energy increase from Li to Cs
B: Melting point increase from Li to Li to Cs
C: Ionization energy increase from F to I
D: Melting point increase from F to I
My answer is A
No, it is easier to ionize Cs than Li. Look at F to I. F is a gas while iodine is a solid
5.Which compund of an element in period 3 react with water to form a solution with a PH greater than 7?
A: SiO2
B: SiCl4
C: NaCl
D: Na2O
My answer is A
Sand is essentially SiO2. Is that even very soluble in water?
6. When Na,K, and Mg are arranged in increasing order of atomic radius (small first), which order correct?
A: Na,K,Mg
B:Na,Mg,K
C:K,Mg,Na
D:Mg,Na,K
my answer is D.
yes.
1. Which two elements react vigorously with each other?
A: Chlorine and lithium
B:Chlorine and potassium
C:iodine and lithium
D:iodine and potassium
my answer is B
2. which statement about electronegativty is correct.
A: Electronegativity decrease across a period.
B:Electronegativity increasse down a group
C: Metal generally have electronegativity values than non-metal
D:Noble gases have the highest electronegativity values.
my answer is A
4.Which statement is correct for a periodic trend?
A: Ionization energy increase from Li to Cs
B: Melting point increase from Li to Li to Cs
C: Ionization energy increase from F to I
D: Melting point increase from F to I
My answer is A
5.Which compund of an element in period 3 react with water to form a solution with a PH greater than 7?
A: SiO2
B: SiCl4
C: NaCl
D: Na2O
My answer is A
6. When Na,K, and Mg are arranged in increasing order of atomic radius (small first), which order correct?
A: Na,K,Mg
B:Na,Mg,K
C:K,Mg,Na
D:Mg,Na,K
my answer is D.
Can any one check my anser.
1 answer