WILL GIVE OUT BRAINLIEST..

1 answer:

3 0

Iron-Metal
Boron, Carbon- Same period
Cobalt,Iron- Same family
Hydrogen- smallest atomic number
If C is 20 D should be 21

You might be interested in

Why Does Grape Flavor Smell The Way It Is When Actual Grapes Don't Taste Or Smell Anything Like It? I looked up this question an

frez [133]

Answer:

That is a good question... Maybe Because it is artificial and the makers do not know how to mimic nature.

Explanation:

5 0

3 years ago

Read 2 more answers

What provides great Britain with a moderate climate? How?

adelina 88 [10]

What provides Great Britain with a moderate climate is the Gulf Stream, a warm current that keeps Britain's climate mild, and this brings them warmer water from the Caribbean areas.

8 0

3 years ago

How many atoms of Lead are in a 62.7 g sample of Lead(II) permanganate?

Alexandra [31]

Answer:

$\large \boxed {8.48 \times 10^{22}\text{ atoms}}$

Explanation:

1 mol of Pb(MnO₄)₂contains 1 mol of Pb atoms.

1. Moles of Pb

$\text{Moles of Pb} = \text{62.7 g Pb(MnO$_{4}$)}_{2} \times \dfrac{\text{1 mol Pb(MnO$_{4}$)}_{2}}{\text{445.07 g Pb(MnO$_{4}$)}_{2}}\\\\\times \dfrac{\text{1 mol Pb}}{\text{1 mol Pb(MnO$_{4}$)}_{2}} = \text{0.1409 mol Pb}$

2. Atoms of Pb

$\text{Atoms of Pb} = \text{0.1409 mol Pb } \times \dfrac{ 6.022 \times 10^{23}\text{ atoms Pb }}{\text{1 mol Pb }}\\\\= \large \boxed {\mathbf{8.48 \times 10^{22}}\textbf{ atoms Pb }}$

8 0

2 years ago

What is the difference between altitude and latitude?

Delvig [45]

Answer:

Altitude is an anagram of latitude. Latitude is an anagram of altitude.

Explanation:

As nouns the difference between latitude and altitude is that latitude is (geography|astronomy) the angular distance north or south from a planet's equator, measured along the meridian of that particular point while altitude is the height measured from sea level up to any given point.

4 0

2 years ago

In the Bohr model of the hydrogen atom, an electron moves in a circular path around a proton. The speed of the electron is appro

Zolol [24]

This is an incomplete question, here is a complete question.

In the Bohr model of the hydrogen atom, an electron moves in a circular path around a proton. The speed of the electron is approximately $2.15\times 10^6m/s$ ?