<span>the atom that has these characteritics is called beryllium nucleus</span>
OPTION B & C are the answers....
There’s no element with symbol M
Answer:
B.
Explanation:
One mole is the amount of substance that contain the Avogadro number which is equal to 6.022×10^23 atom, molecules or ions.
Answer: Observation is essential in science. Scientists use observation to collect and record data, which enables them to construct and then test theories
Explanation:
