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2 years ago

7

PLEASE help and quickly as possible it is one question that i need answered so that i can answer all my other questions PLEEEEAS

E
it's for science- it's about fossils - please answer question A with an explanation on what the fossil is

1 answer:

Gnoma [55]2 years ago

6 0

Answer:

fossilized trilobites

Explanation:

I hope it help

brainliest plssssss

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3 years ago

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Answer:

Cd2+ : 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 4d10 or [Kr] 4d¹⁰

Explanation:

Before proceeding to write out the electron configuration of Cd2+, we have to obtain the electron configuration of Cadmium (Cd),

Cadmium has an atomic number of 48, this means that a neutral cadmium atom will have a total of 48 electrons surrounding its nucleus.

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Cd: 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10

The shorthand notation is given as;

Cd: [Kr] 4d¹⁰5s²

Cd2+ means that it has two less electrons, hence it's electron configuration is given as;

Cd2+ : 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 4d10 or [Kr] 4d¹⁰

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