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3 years ago

7

How many electrons does sodium lose in a chemical reaction ?

1 answer:

Dimas [21]3 years ago

8 0

Neither it’s 10
I think this is right

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What scientific instrument is capable of measuring very small masses?

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Electronic balances.

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What is the next atomic orbital in the series 1s 2p 3s 3p

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Answer:

s an example, the ground state configuration of the sodium atom is 1s22s22p63s1, as deduced from the Aufbau principle (see below). The first excited state is obtained by promoting a 3s electron to the 3p orbital, to obtain the 1s22s22p63p1 configuration, abbreviated as the 3p level.

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A 38.6 kg marble slab is shown above. What is its density? Give your answer to the nearest tenth.

LuckyWell [14K]

Answer:

Density, $d=26.7\ g/cm^3$

Explanation:

The attached figure shows a 38.6 kg marble slab. The dimensions of the marble slab is 23 cm × 17 cm × 4 cm

Density = mass/volume

Volume of a cuboid shape is equal to, V = 23 cm × 17 cm × 4 cm

V = 1564 cm³

Density,

$d=\dfrac{38.6\times 10^3\ g}{1564\ cm^3}\\\\d=24.68\ g/cm^3$

or

$d=26.7\ g/cm^3$

So, the density of the marble slab is $26.7\ g/cm^3$ .

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4 years ago

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