3 years ago

HELP PLEASE?! I will upvote all answers!

1 answer:

6 0

I believe the answer is a theory.

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IgorLugansk [536]

False.
Na does represent sodium, but NOT when it lost an electron. Na+ represents sdoium when it lost its electron.

3 0

3 years ago

Lorico [155]

Chromium is in Group 6, so elemental chromium has 6 valence electrons. Therefore, chromium 3+ has three 3d-

6 0

2 years ago

Alex

Answer: % error of observation is 4.77%

Explanation:

Given:

Observation value = 415nm

theoretical value= 435.8nm

Percent error of observation = theoretical value- observation value/ theoretical value x 100 %

= 435.8-415/435.8= 0.04772 x 100 = 4.77%

therefore % error of observation is 4.77%

7 0

3 years ago

Hatshy [7]

Classify what. explain more

6 0

3 years ago

pentagon [3]

Answer:

Highest energy will be equal to $9.6\times 10^{-13}J$

Explanation:

Charged on doubly ionized helium atom $q=2e=2\times 1.6\times 10^{-19}C=3.2\times 10^{-19}C$

It is accelerated with maximum voltage of 3 MV

So voltage $V=3\times 10^6volt$

Now energy is given by $E=qV=3.2\times 10^{-19}\times 3\times 10^6=9.6\times 10^{-13}J$

So highest energy will be equal to $9.6\times 10^{-13}J$

5 0

3 years ago