In beta decay, a neutron is transformed into a proton via emission of an electron. This means that the total nucleon number remains the same; however, the proton number is increased by one (and the neutron number decreases by one). Therefore, the parent atom must also have mass number 99 but be of one less atomic number.
The atomic number of Tc is 43 and proton number 42 is Mo. Therefore, the answer is:
99Mo
<u>Substances in order of increasing vapor pressure at a given temperature is </u><u>SF4 < SF6 < SiH4</u>
- The substance with the lowest vapor pressure will also have the greatest boiling point.
- A liquid attribute associated with evaporation is vapor pressure.
- The distribution of kinetic energy among the molecules in a liquid (or any substance) is influenced by the system's temperature.
<h3>How do you determine vapor pressure?</h3>
- Vapor pressure in chemistry is the force that an evaporating substance exerts against the walls of a sealed container (converts to a gas).
- Use the Clausius-Clapeyron equation to determine the vapor pressure at a specific temperature: ln(P1/P2) = (Hvap/R)((1/T2) - (1/T1)
Which has highest vapor pressure?
- At the normal boiling point of a liquid, the vapor pressure is equal to the standard atmospheric pressure defined as 1 atmosphere, 760 Torr, 101.325 kPa, or 14.69595 psi.
- For example, at any given temperature, methyl chloride has the highest vapor pressure of any of the liquids in the chart.
Learn more about vapor pressure
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Milliliter and killoliter! So no u can't measure a liquid with meters
Answer: 4 A1+3 02 → 2 Al2O3
Explanation: Two different atoms combines together to produce a compound.
They try to base their conclusions off of data and measurements of which they should record from conducting experiments