The answer to this is Hydrogen. <span />
Mass is always conserved in a physical change. Energy may be released or absorbed when a substance changes from one physical state to another. In a chemical change, a chemical reaction yields a completely new substance. A substance's particles are changed during a chemical reaction.
Answer is (1) - N
<em>Explanation:</em>
I think the given chart is electronegativity chart.
Electronegativity is a
value that tells us how an atom can attract electrons towards itself. <span><u>If the electronegativity is
high, then the attraction to the electrons is high unless the attraction to the
electrons is low. </u>
Electronegativity increases from left to right of the periodic table and decreases from up to down.
Hence, highest electronegative atom is F which has 4.0 and lowest electronegative atoms are Cs and Fr (0.7).
The electronegativity values for given atoms are
N - 3.0
Na - 0.9
P - 2.1
Pt - 2.2
</span>
The answer is 5.60 x 1023= 5,728.8
Answer:
Iron (II) ion.
Explanation:
- Fe²⁺ is a cation of ion that lost 2 electrons.
- It can be named as <em>iron (II) ion.</em>
- Iron is the name of the metal, and (II) means that it is the cation of Fe metal that lost 2 electrons.
- While Iron ion may be Fe²⁺ or Fe³⁺.
<em>So, the right choice is: iron (II) ion.</em>
