The mass of a proton is equal to the mass of the neutron. What is the atomic mass of an atom ? Group of answer choices number of neutrons only number of protons and neutrons number of protons only number of electrons only

number of protons and neutrons

Explanation:

hey there,

< Electrons do not count toward the overall atomic mass of an atom, so the atomic mass of an atom is the size of protons + neutrons.

(Protons and neutrons make up the nucleus.) >

Hope this helped! Feel free to ask anything else.

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explanation:

i think

the level of progesterone is low at the pre-ovulatory phase of the cycle but it gradually increases and the levels are high at the luteal phase. if pregnancy occurs, the level of progesterone will be high throughout the pregnancy.

if egg is fertilized and the mother gets pregnant, progesterone starts preparing the uterus for the implantation. it starts building up the lining of uterus and make it hostile of the period of pregnancy.