Which sentences describe alpha particles? 1. Alpha particles consist of two protons and two neutrons.
2. Alpha particles consist of a negatively charged electron emitted by a nucleus.
3. Alpha particles are produced during alpha decay.
4. Alpha particles are produced during beta decay.
5. Alpha particles release energy.

1. Alpha particles consist of two protons and two neutrons.

Explanation:

Alpha particles are generally produced in the process of alpha decay, a radio active decay in which an atom loses an helium atom.

AN alpha particle is identical  to the helium particle. The helium particle has mass number of 4 and atomic number of 2. This means;

Number of protons = 2

Number of neutrons = Mass Number - Atomic Number = 2

The correct option is option 1.

stupid i wont let you get a chance

explanation:

when [oh-] is 10-5  m, and [h3o+] is 10-9  m, the poh is 5 and ph is 9. again in both cases the sum of ph and poh is 14. however, the hydrogen ion concentration is not always going to be equal to exactly 1 x 10 raised to a negative number. for example, we skipped over the value of 2.0 x 10-7.