Answer:
the chemical element of atomic number 2, an inert gas which is the lightest member of the noble gas series.
Explanation:
Because it is very unreactive, helium is used to provide an inert protective atmosphere for making fibre optics and semiconductors, and for arc welding. Helium is also used to detect leaks, such as in car air-conditioning systems, and because it diffuses quickly it is used to inflate car airbags after impact.
Answer:
120.575 kJ is the activation energy for the souring process.
Explanation:
The formula for an activation energy is given as:
where,
= rate constant at =
= rate constant at =
= activation energy for the reaction = ?
R = gas constant = 8.314 J/mole.K
= initial temperature =
= final temperature =
Now put all the given values in this formula, we get:l
120.575 kJ is the activation energy for the souring process.
Beryllium has an atomic number of 4, so a beryllium atom has 4 protons in its nucleus.
Since the charge of 1 proton is +1 and neutrons in the nucleus have 0 charge, the correct answer is (4) +4.
Hope this helps~
Answer: Chemical X H3 and f1
Explanation: