Answer:
Beryllium
Explanation:
Given parameters:
Number of protons = 4
Number of neutrons = 5
Number of electrons = 4
Unknown:
Element = ?
Solution:
To determine an element, the atomic number is the most important identifier.
The atomic number is the number of protons in an atom.
Since the atom here has a proton number of 4, checking on the periodic table, it is Beryllium, Be
example of oxide ore are hematite ,magnetite,chromite, zincite
Sound waves are most effective when traveling through solids. Less effective when in liquids and least effective in air.
Fluorine has 9 protons and 9 electrons
Iodine has 53 protons and 53 electrons
