Answer:
Potassium-40 (40K) is a radioactive isotope of potassium which has a long half-life of 1.251×109 years. It makes up 0.012% (120 ppm) of the total amount of potassium found in nature.
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Potassium-40.
General
Natural abundance 0.0117(1)%
Half-life 1.251(3)×109 y
Parent isotopes Primordial
Decay products 40Ca (β−) 40Ar (EC, γ; β+)
Answer:
Solid ionic compounds do not conduct electricity because the ions are held firmly in place. The ions cannot move to conduct the electric current. But when an ionic compound melts, the charged ions are free to move. Therefore, molten ionic compounds do conduct electricity.
Answer:
a. True
Explanation:
The bond angle for methane is the angle determined by two consecutive hydrogen atoms and the central carbon atom.
Methane, a tetrahedron has the structural formula:
H
|
H - C - H
|
H Methane, CH4
The bond angle is the angle between the H-C-H atoms and is 109.5degrees.
Answer:
Delete my comment if your gay
Explanation:
