Answer:
Zirconium has 40 protons and 51 neutrons
Answer:
An emerald can be described as a pure substance because it is a compound. it's a pure substance because it is an element. It's an impure substance because it is chemically combined, an impure substance because it is a mixture.
Explanation:
Answer:
Arrhenius Base
Explanation:
"NaOH is an Arrhenius base because it dissociates in water to give the hydroxide (OH-) and sodium (Na+) ions. An Arrhenius acid is therefore any substance that ionizes when it dissolves in water to give the H+, or hydrogen, ion. ... Acids provide the H+ ion; bases provide the OH- ion; and these ions combine to form water."
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<em> -Aadi x</em>
The discovery of the electron as a subatomic particle was a result of English physicist J.J. Thomson
Answer:
The moon revolves around the Earth once every 29.5 days
Explanation:
So around 30 days.
