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galben [10]
4 years ago
5

Which of the following particles does not have the same electron configuration as the others?

Chemistry
1 answer:
Dmitry [639]4 years ago
6 0

Answer:

D. Al^3+

Explanation:

All the other elements given have the same number of elecetron

K has 19 electrons, since it is given as K+, it means that K has lost one electon, therefore K has 18 electrons now

Cl has 17 electrond, since it is given Cl^1- it means Cl has gained one electron , therefore now Cl has 18 electrons

Ar normally has 18 electrons

Al has 13 electrons, since it is given has Al^3+ it means Al has lost 3 electons, therefore now Al has only 10 electrons

In oder to answer this question easily it is must to know first 20 elements of the Modern Peroidic Table

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In sexually reproduction, how many do the offspring compare to the parents?
tatuchka [14]
In sexual reproduction the offspring has similar genetics and look of those of the parents. In asexual reproduction, it will look like the one parent, but it won't have the parent. The parent would have split in two and created two daughter cells, but when they make buds of them they have one child and on parent. Hope I helped! ;)
8 0
3 years ago
6) How many valence electrons does an atom of Cu possess?
agasfer [191]
The answer is c)11 because copper has 11 valence electrons
7 0
3 years ago
Select the expression that is equivalent to 3x105+5x108.
VashaNatasha [74]
When you're dealing with scientific notation (especially when you use an order of operations such as adding on it), it's important to know that you cannot add 10^2 to 3 (for example).

(3 x 10^5) + (5 x 10^8)

When adding exponents, you're only adding the exponents together and not changing the original number (10).

5 + 8 = 13

We now have a sum of 3x5 x10^13

Multiply 3 by 5 to get your new expression.

3 x 5 = 15

15 x 10^13 is what we're left with.

Your answer is A.)

I hope this helps!

8 0
3 years ago
In 1911, Hans Geiger and Ernest Marsden (working under Ernest Rutherford) conducted an experiment involving alpha particles and
omeli [17]

Answer:

Explanation:

According to the experiment, the very nucleus of the atom is conformed by protons and neutrons, whereas electrons are diminute and have low mass in comparisson to protons and neutrons. So then, the nucleus accounts for the size and the mass of the atoms.

5 0
3 years ago
PLEASE HELP ASAP!!!
xz_007 [3.2K]

Answer: 207.24

Explanation: Atomic mass = no of protons + no of neutrons

1) 82 protons, 122 neutrons , mass number= 82+122 = 204

2) 82 protons, 125 neutrons,  mass number= 82+125 = 207

3) 82 protons, 124 neutrons, mass number= 82+124 = 206

4) 82 protons, 126 neutrons, mass number= 82+126 = 208

Average atomic mass of an element =  \sum(\text{atomic mass of an isotopes}\times {{\text {fractional abundance}}

Average atomic mass of given element =  (204\times 0.014+207\times 0.221 +206\times 0.241+208\times 0.524)=207.24

The approximate atomic mass of lead is 207.24.



8 0
4 years ago
Read 2 more answers
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