Answer:
Name the element: Beryllium
Number of shells: 4
Valence electrons: 2
Explanation:
B. carbon-13 is not an allotrope of Carbon.
Allotropes<span> are elements on the periodic table that have more than one crystalline form. </span>Isotopes<span> are atoms of the same element with the same atomic number but have a different mass number.
C-13 is an isotope of carbon, not an allotrope.</span>
Answer:
Volcanic Eruption releases heated ash and Tephra through its column generating its own lightning.
Hope it helps!<3
Answer:
9
Explanation:
mass number = protons + neutrons
= 4 + 5 = 9
Yes, S-blocks are metals except for helium and hydrogen. The S-block metals are shiny, silvery and relatively soft, although they can easily lose electrons. Helium and hydrogen have valence electrons but also lack some similar properties as the other metals.
