Draw the Lewis structures of N2, O2, H20, and CH4. Compare your drawing to the ones in the drawing on this test and select

When calcium reacts with tellurium to form an ionic compound, each metal atom loses electron(s) and each nonmetal atom gains ele

Finger [1]

Answer:

When calcium reacts with tellurium it will donates its two electrons and these two electron will be accepted by tellurium.

There must be 1 calcium atom for every 1 tellurium atom in the reaction.

Explanation:

Calcium has atomic number of 20. Its electronic configuration is given as:

$[Ca]=1s^2 2s^2 2p^6 3s^2 3p^6 4s^2$

Calcium atom will loose 2 elections to attain electronic configuration of noble gas.

$[Ca^{2+}]=1s^2 2s^2 2p^6 3s^2 3p^6 4s^0$

$Ca\rightarrow Ca^{2+}+2e^-$

Tellurium has atomic number of 52. Its electronic configuration is given as:

$[Te]=1s^2 2s^2 2p^6 3s^2 3p^6 4s^2 3d^{10} 4s^24p^6 4d^{10} 5s2 5p4$

Tellurium atom will gain 2 elections to attain electronic configuration of noble gas.

$[Te^{2-}]=1s^2 2s^2 2p^6 3s^2 3p^6 4s^2 3d^{10} 4s^24p^6 4d^{10} 5s2 5p6$

$Te+2e^-\rightarrow Te^{2-}$

So, when calcium reacts with tellurium it will donates its two electrons and these two electron will be accepted by tellurium.

$Ca^{2+}+Te^{2-}\rightarrow CaTe$

There must be 1 calcium atom for every 1 tellurium atom in the reaction.

7 0

3 years ago

Which element has a larger ionic radius sulfur (S)?

Sati [7]

<h2>C. Chlorine (Cl)</h2><h2>This is your answer. </h2>

7 0

3 years ago

Read 2 more answers

Which shape of eyeglass lens should be placed in front of the eye in order for the image to form on the retina?

Llana [10]

Answer:

B

convex: for long sightedness

Or

A

concave: for short sightedness

3 0

3 years ago

Why does magnesium oxide have a higher lattice energy than calcium oxide?

Artist 52 [7]

Because the attractive forces are governed by the relationship $F = \frac{ q_{1} q_{2}}{ r^{2} }$ we know that the bond strength between the ions of opposite charge depends on the charges on the ions and the distance between the centers of the ions when they pack to form a crystal.

In the example of MgO (magnesium oxide) and NaCl, MgO has a much higher lattice energy because the ions are +2 and -2, instead of +1 and -1.

But your problem doesn't deal with the magnitude of the charge; it concerns the ionic radii.

Smaller ions are packed closer together, meaning the attractive forces are working across a smaller distance and are thus stronger. We know based on periodic trends that as you move down a group, the ion radius increases. Therefore, the lattice energy decreases.

Both Mg and Ca are alkaline earth metals (group II on the periodic table). But Mg is one row above Ca, meaning its ionic radius is smaller. Therefore, its lattice energy is larger.

5 0

4 years ago

What is the pH of a 900 mL solution containing 3.40 grams of hydrocyanic acid

Allushta [10]

Answer:

$pH = 5.05$