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#3

+1

The number of electrons in an atom is equal to the number of protons (Atomic number of an element)

Well for example take calcium, its atomic number is 20 (Electrons=protons)

we have 4 orbits (For begineers)

which are called k l m n

But forget about this for now,

in the first orbit the maximum number of electrons placed is 2

so,

2

in the second orbit it can take up to eight as well as the third and the fourth so it would be:

2 8 8 2

(Ran out of electrons to fill the 4th orbit(N)) When this atom gets in chemical reaction, it will lose 2 electrons and have a +2 above it so it has an outermost level shell (Valency electrons) = 8

GuestOct 24, 2019

#1

0

From 1 to 9 =None
From 10 to 99 = 9
From 100 to 199 =20
From 200 to 999 =160
From 1000 to 1999 =300
From 2000 to 2001(inclusive) =5
Grand Total = 9 + 20 + 160 + 300 + 5 =494 zeros

P.S. If you don't want 2001 included, then:494 - 2 =492 zeros.

GuestOct 24, 2019

#1

+248

+1

The rows of Pascal's triangle sum to powers of 2, so the elements of the nth row (the row with only one element in it being row 0) sum to 2ⁿ (there's a really cool counting proof for this but you probabally don't need to know that)

so f(n)=log(2ⁿ)

Put this into the fraction:

$\frac{\log{2^{n}}}{\log{2}}$

Pop that n out front from logarithm laws:

$\frac{n\cdot\log{2}}{\log{2}}$

The log(2)s cancel out and you are left with $\frac{f(n)}{\log_{10}2}=\boxed{n}$

.

power27Oct 24, 2019

#2

+1

^

|

I would actually like to try that out.

Anyways, using a periodic table, the atomic number is the amount of protons and electrons in the atom. Hope this helped!

-o_o

GuestOct 24, 2019

#2

0

Wait, so would they switch over to Photobucket now??? What would they do with images now then?

GuestOct 24, 2019

#2

+700

+1

great explanation CPhill!!

NirvanaOct 24, 2019

#3

+700

0

I know that unfortunately, there are some users that might want to cheat, but we can't just assume that every person who asks a specific question is a cheater...

maybe OP is actually trying to learn the material....

:')

NirvanaOct 24, 2019

#2