Number of lone pair electrons = logarithm of electrons - logarithm of bonding electrons. How to calculate the logarithm of electrons?

Number of lone pair electrons = logarithm of electrons - logarithm of bonding electrons. How to calculate the logarithm of electrons?

Logarithm of electrons = (number of valence electrons of central atom + number of bonding atoms - number of charges) / 2
The number of bonding atoms does not include o
For example, CoCl2 = (4 + 2) / 2 = 3
SO4(2-) = [6 + 0 - (-2) ]/2 = 4
[PCl6](-) = [ 5 + 6 - (-1)]/2 = 6
XeOF4 = (8 + 4)/2 = 6

How to explain "the logarithm of 1 equals 0"?
How to judge the base and the uncertainty of logarithm?

Any number to the power of 0 is equal to 1 (divided by 0), so loga1 = 0

What does logarithm mean for a number?

If a ^ n = B, then logab = n. where a is called the "base", B is called the "true number", and N is called the "logarithm of B with a as the base". Accordingly, the function y = logax is called the logarithmic function. Zero and negative numbers have no logarithm. The base a is a constant, and its value range is (0,1) ∪ (1, + ∞)

F (x) = the fourth power of X + the second power of X for parity

Function parity judgment method: F (- x) = f (x) = = > even function. F (- x) = - f (x) = = > odd function. So you can judge that the equation you proposed is even function! The specific process is not written~

The number of zeros of function y = log2 | x | - 1

According to the title log2|x| = y + 1
When y = 0, log2 | x | = 1
2|x|=10^1
2|x|=10
|x|=5
Then x = 5 or - 5
So the number of zeros is two

The denominator of a fraction is the largest prime factor of 420, and the numerator is the smallest prime factor of 420. The fractional unit of this fraction is

2/7
1/7

A + B = 7, ab = 2. Find the square of a + the square of B

a²+b²
=(a+b)²-2ab
=7²-2×2
=49-4
=45

The proof process of the derivative of [f (x) * g (x)] (to be simple and clear)

△y=f(x+△x)g(x+△x)-f(x)g(x)=f(x+△x)g(x+△x)-f(x+△x)g(x)+f(x+△x)g(x)-f(x)g(x)=f(x+△x)[g(x+△x)-g(x)]+g(x)[f(x+△x)- f(x)]lim△x→0 (△y/△x)=lim△x→0f(x+△x)[g(x+△x)-g(x)]+lim△x→0g(x)[f(x+△x...

What is the least common multiple of 18 and 19

Least common multiple = 18 * 19 = 342

What is the product of 3 / 5 minus 1 / 3 multiplied by the reciprocal of 2 / 5?
The process to work out

Two thirds
Three out of five minus one out of three equals four out of fifteen. Multiply the reciprocal of two out of five to get two-thirds