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3 years ago

Which element will most easily lose an electron?

Chemistry

2 answers:

Vadim26 [7]3 years ago

7 0

Answer:

Explanation:

Group 1 elements lose an electron to form charged positive ions.

Potassium is from group 1.

Potassium is most likely to lose an electron.

tresset_1 [31]3 years ago

5 0

Answer:

Explanation:

The elements that will most likely lose an electron are those that are in Group 1. This is because they only have one valence electron in their outer shell. Atoms want to have 8 electrons in their outer shell and in order for the elements of Group 1 to do so, they could either lose one electron or gain 7 but losing one is easier to do. Out of these answer choices, the only one that belongs to Group 1 is potassium.

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Radioactive decay can be described by the following equation where is the original amount of the substance, is the amount of the

soldi70 [24.7K]

Answer:

Iron remains = 17.49 mg

Explanation:

Half life of iron -55 = 2.737 years (Source)

$t_{1/2}=\frac {ln\ 2}{k}$

Where, k is rate constant

So,

$k=\frac {ln\ 2}{t_{1/2}}$

$k=\frac {ln\ 2}{2.737}\ year^{-1}$

The rate constant, k = 0.2533 year⁻¹

Time = 2.41 years

$[A_0]$ = 32.2 mg

Using integrated rate law for first order kinetics as:

$[A_t]=[A_0]e^{-kt}$

Where,

$[A_t]$ is the concentration at time t

$[A_0]$ is the initial concentration

So,

$[A_t]=32.2\times e^{-0.2533\times 2.41}\ mg$

$[A_t]=32.2\times e^{-0.610453}\ mg$

$[A_t]=17.49\ mg$

Iron remains = 17.49 mg

8 0

3 years ago

Find the mass of one atom of uranium-235. Recall that the mass in atomic mass units is equal to the mass in grams of one mole of

stiv31 [10]

Answer:

$3.90*10^{-25}kg/atom$

Explanation:

The molar mass of uranium-235 is 235 g/mol. So one mole of uranium-235 has a mass of 235 g. Put differently 6.022×10^23 atoms of uranium-235 have a mass of 235 g. Knowing that, how can we use that to find the mass of one atom?

mass of one atom = $\frac{235 g}{1mol} *\frac{1 mol}{6.022*10^{23}atoms } *\frac{1kg}{1000g}= 3.90*10^{-25}kg/atom$

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3 years ago

25 #of protons # of neutrons # of electrons

Molodets [167]

Answer:

Explanation:

number of electrons should also be 16.

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JulijaS [17]

Answer:

true!

Explanation:

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3 years ago

Which of the following is true of gases

yuradex [85]

Explanation:

i think its 4, i might be wrong.

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3 years ago