知到答案Basic Chemistry 基础化学智慧树答案_2022年

第四章

There are __________ paired and __________ unpaired electrons in the Lewis symbol for a phosphorus atom.
4, 3
4, 2
2, 4
2, 3
答案:2, 3
There are __________ unpaired electrons in the Lewis symbol for an oxygen atom.
3
0
2
4The electron configuration of the phosphide ion (P3- ) is __________.Elements from opposite sides of the periodic table tend to form __________.
covalent compounds that are gaseous at room temperature
ionic compounds
homonuclear diatomic compounds
compounds that are gaseous at room temperatureDetermining lattice energy from Born-Haber cycle data requires the use of __________.How many hydrogen atoms must bond to silicon to give it an octet of valence electrons?
2
1
5
4In the molecule below, which atom has the largest partial negative charge __________?
C
F
I
BrElectronegativity __________ from left to right within a period and __________ from top to bottom within a group.
stays the same, increases
increases, increases
increases, stays the same
increases, decreasesThe Lewis structure of AsH3 shows __________ nonbonding electron pair(s) on As.
0
2
1
3The formal charge on carbon in the molecule below is __________.
0
1
3
-1