4 years ago

The element X has 2 valence electrons. its is a

Chemistry

1 answer:

Lesechka [4]4 years ago

6 0

helium, beryllium, magnesium, calcium, strontium, barium, radium. i believe any of these are proper answers.

You might be interested in

Which one sounds better "the reign of scar", or "Scar's Reign"

xz_007 [3.2K]

Answer:

i think

Explanation:

"the reign of scar" will sound better

4 0

2 years ago

Read 2 more answers

Iron (Fe) has three isotopes. Calculate the average atomic mass of the element Fe using the following data: Isotope atomic mass

Maksim231197 [3]

Answer:

Average atomic mass = 55.83 amu

Explanation:

The formula for the calculation of the average atomic mass is:

$Average\ atomic\ mass=(\frac {\%\ of\ the\ first\ isotope}{100}\times {Mass\ of\ the\ first\ isotope})+(\frac {\%\ of\ the\ second\ isotope}{100}\times {Mass\ of\ the\ second\ isotope})+(\frac {\%\ of\ the\ third\ isotope}{100}\times {Mass\ of\ the\ third\ isotope})$

Given that:

For first isotope, Fe-54:

% = 6 %

Mass = 53.94 amu

For second isotope, Fe-56:

% = 92 %

Mass = 55.93 amu

For third isotope, Fe-57:

% = 2 %

Mass = 56.94 amu

Thus,

$Average\ atomic\ mass=\frac{6}{100}\times {53.94}+\frac{92}{100}\times {55.93}+\frac{2}{100}\times {56.94}$

<u>Average atomic mass = 55.83 amu</u>

5 0

3 years ago

Plz help me guys for 20 points 5th GRADE SCEINCE

Usimov [2.4K]

Option 3 using forest land to build homes

3 0

3 years ago

Read 2 more answers

What is the number of electrons in oxygen

Semmy [17]

Answer for your question is;

2,6 = 8
The first shell is 2 electrons the other shell is 6 electrons

6 0

2 years ago

Read 2 more answers

Please help me, please

kumpel [21]

The temperature of a substance is related to the speed of the substance's particles. So, when the temperature of a substance changes,the speed of the particles also changes. So B.

6 0

3 years ago