An unbalanced chemical equation is shown below. Pb(NO3)2 +
PbC104 +
K2CrO4 →
KNO3
Which coefficients are needed to balance this
equation?
A 2, 4, 4, 6
B. 2, 4, 4, 3
C. 1, 1, 1, 2
D. 1. 6, 6, 2

a electronegativity decreases beacuse the size of nucleus is bigger.

1. a)c-14 has two more protons

2. d)they have different numbers of protons, neutrons, and valence electrons; they are all gases at room temperature.

3. c) iron and nickel.

it’s previous models   because when i picked that son of a gun’s answer it was wrong look for previous models because they might make it a different letter