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3 years ago

How far above earth is the international space station

Chemistry

1 answer:

Rasek [7]3 years ago

4 0

Answer:

248 miles

Explanation:

At an average altitude of 248 miles (400 kilometers) above Earth, the space station is the third brightest object in the sky.

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Can metals have covalent radius and van der Waal's radius instead of metallic radius?

romanna [79]

Explanation:

Whether you choose to use van der Waals radii or metallic radii as a measure of the atomic radius, for metals the ionic radius is smaller than either, so the problem doesn't exist to the same extent. It is true that the ionic radius of a metal is less than its atomic radius (however vague you are about defining this).

4 0

3 years ago

What is the number of electrons shared between the atoms in I2 molecule (That is an i not a 1)

labwork [276]

Iodine is one of seven elements that usually form as diatomic molecules. These other "diatomics" are $O_2, H_2, F_2, Br_2, N_2,$ and $Cl_2$ . They typically bond to themselves.

Iodine has seven valence electrons. Using valence shell electron pair repulsion (VSEPR) theory, we can predict the Lewis dot structure for $I_2$ . We see there are fourteen electrons, and we can make a covalent bond, leaving three lone pairs on each atom. The bond replaces two electrons, so the number of electrons shared is two.

4 0

3 years ago

What is the name for the gaseous sphere surrounding earth

Harlamova29_29 [7]

The atmosphere is the name for and the gaseous sphere surrounding Earth.

5 0

3 years ago

The relative abundances of the stable isotopes of the elements are not entirely constant. For example, in some geologic samples

Mrac [35]

<u>Answer:</u> The other isotope is $_{37}^{87}\textrm{Rb}$

<u>Explanation:</u>

Beta decay is defined as the decay process in which a neutron gets converted to a proton and an electron.

In this decay process, beta particle is emitted. The emitted particle carries a charge of -1 units and has a mass of 0 units. The released beta particle is also known as electron.

The general equation for the beta decay process follows:

$_Z^A\textrm{X}\rightarrow _{Z+1}^A\textrm{Y}+_{-1}^0\beta$

The chemical equation for the beta decay of an isotope that produces Sr-87 isotope follows:

$_{37}^{87}\textrm{Rb}\rightarrow _{38}^{87}\textrm{Sr}+_{-1}^0\beta$

The isotope that undergoes beta decay to form Strontium-87 isotope is Rubidium-87

Hence, the other isotope is $_{37}^{87}\textrm{Rb}$

4 0

3 years ago

Explain the law of conservation of energy

Brilliant_brown [7]

In physics, the law of conservation of energy states that the total energy of an iolated system remains constant, it is said to be conserved over time. energy can neither be destroyed rather it transforms from one form to another.

3 0

3 years ago