The nucleus of an atom is
2 answers:
Answer:
The nucleus is composed of protons and neutrons. A nucleus usually refers to the central core of something.
Explanation:
Answer:
a. The central core and is composed of protons and neutrons.
Explanation:
A nucleus of anything is a central core. The nucleus of an atom is composed of protons and neutrons.
b. is wrong. Except for H, the number of neutrons is always equal to or greater than the number of protons.
c. and d. are wrong. The nucleus is positively charged.
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1 mole Hg ---------------- 6.02x10²³ atoms
?? ------------------------- 1.30 x10⁷ atoms
1.30x10⁷ x 1 / 6.02x10²³ =
= 1.30x10⁷ / 6.02x10²³ => 2.159x10⁻¹⁷ moles
hope this helps!
A physical change.
Physical change = can be reverted + doesn't change substance
Chemical = changes substance
A white insoluble solid would appeaer
20 mol of NH, can be produce from 30 mol o H2
Explanation:
I thought oxygen
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