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son4ous [18]
3 years ago
5

Elements are grouped together in the_______table.

Chemistry
2 answers:
strojnjashka [21]3 years ago
6 0
It's grouped in the periodic table because one proton can change what the element is it's groups all the element known in the universe well for now it's grouped in rows and columns the 3 major types of category of elements are metals,metalloids,and lastly nonmetals
Anika [276]3 years ago
3 0
The answer is a ..........
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BRAINLIESTTT ASAP!!!! PLEASE HELP ME :)
Elan Coil [88]

Answer:

1s² 2s²2p³  

Explanation:

If the atom has seven electrons, it is Element 7 (nitrogen).

In the Periodic Table, you count the electrons in all the subshells up to

No. 7.

In the first Period, you have filled the 1s level (2 electrons).

In the second Period, you have filled the 2s subshell (2 electrons) and put three electrons in the 2p subshell.

Thus, the electron configuration is

1s² 2s²2p³

Note how the superscripts tell you the number of electrons in each subshell: <em>2 + 2 + 3 = 7</em>.

6 0
2 years ago
Which chemical formula corresponds to this structural formula?
lys-0071 [83]
I think the answer is choice D
8 0
3 years ago
Read 2 more answers
Can someone help, please ??
Bumek [7]
Concentrated I believe
8 0
2 years ago
Read 2 more answers
1. An electric power plant uses energy from burning coal to generate steam at 450 °C. The plant is cooled by 20 °C water
kap26 [50]

Answer:

Explanation:

Efficiency of the electric power plant is e=1-\frac{T_{2}}{T_{1}}

Here Temperature of hot source T_{1} = 450^{o}C=450+273=723 K

and Temperature of sink T_{1} = 20^{o}C=20+273=293 K

Hence the efficiency is  e=1-\frac{293}{723}=0.5947=59.47%

Now another formula for thermal efficiency Is

e_{therm}=\frac{Q_{1}-Q_{2}}{Q_{1}}=\frac{W}{Q_{1}}

Here QI is the of heat taken from source 100 MJ ; Q2 of heat transferred to the sink (river) to be found

W is the of work done and W = QI -Q2

Hence Frome_{therm}=\frac{Q_{1}-Q_{2}}{Q_{1}}=\frac{W}{Q_{1}}

W=e(Q_{1})=(0.5947)(100)=59.47MJ

Hence the of heat transferred to the river Is Q_{2} -W = (100 -59.47=40.53

6 0
3 years ago
Give the name and formula of the compound formed when a Mn2+ cation combines with a (PO4)3- anion
alex41 [277]
Sodium mn2 and po4  makes sodium
3 0
3 years ago
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