Low melting points and boiling points. ...Low enthalpies of fusion and vaporization These properties are usually one or two orders of magnitude smaller than they are for ionic compounds.Soft or brittle solid forms. ...Poor electrical and thermal conductivity.
Explanation:
An atom undergoes alpha decay by losing a helium atom.
So when bismuth undergoes alpha decay, we have;
²¹⁰₈₃Bi --> ⁴₂He + X
Mass number;
210 = 4 + x
x = 206
Atomic number;
83 = 2 + x
x = 81
The element is Thallium. The symbol is Ti.
For the second part;
X --> ⁴₂He + ²³⁴₉₀Th
Mass number;
x = 4 + 234 = 238
Atomic Number;
x = 2 + 90 = 92
The balanced nuclear equation is;
²³⁸₉₂U --> ⁴₂He + ²³⁴₉₀Th
The role of the T cell is to locate the foreign virus, to produce antibodies, and to signal killer T cells to destroy the foreign object.
hope this helps
Answer:
15.41.
Explanation:
- From the balanced equation:
<em>2SO₂(g) + O₂(g) ⇄ 2SO₃(g).</em>
<em />
The equilibrium constant = Keq = [SO₃]²/[SO₂]²[O₂].
<em>∴ Keq = [SO₃]²/[SO₂]²[O₂]</em> = (0.56 mol/L)²/(0.344 mol/L)²(0.172 mol/L) = <em>15.41.</em>
Energy added is relative to the mass gained by the proton multiplied by the speed of light squared. In other words, a lot of energy is converted into a relatively small amount of mass<span>.</span>
