Answer:
Patter 1: Ionization Energy Decreases going down a group
Pattern 2: Ions tend to gain/lose the least amount of electrons
Take oxygen, for example. Oxygen has 8 electrons. To become like a noble gas it could either gain two to become like neon or it could lose six to become like helium. So what will oxygen do—gain two or lose six? As a general rule, atoms will gain or lose the fewest number of electrons possible.
Explanation:
Answer:
Zinc reacts with dilute sulphuric acid to produce hydrogen gas (H2) and zinc sulphate. This is an example of displacement reaction of a non-metal by a metal. ... ZnSO4 is different in chemical composition and chemical properties than Zn and H2SO4 so it is a chemical change.
Answer: second option: mole ratio.
Explanation:
The coefficients of the chemical equation, when balanced, indicate the number ratio in which compounds combine with each other.
In the given equation, <span>Mg+2HCl -->MgCl₂+H₂
1 mole of Mg combines with 2 moles of HCl and produce 1 mole of MgCl₂ and 1 mol of H2.
So, the mole ratio is
1 mol Mg : 2 mol HCl : 1 mol MgCl₂ : 1 mol H₂.
In general, in a balanced equation of the kind aA + bB → cC + dD
The mole ratio is:
a mol of A : b mol of B : c mol of C : d mol D.
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Answer: it is A .
hope this helps!!!!
Explanation:Be is not multivalent