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Which is the most reactive group of non-metals?
The Halogens
Which is the the most reactive group of metals?
The alkali metals
How do you prove an oxide is a basic oxide?
Basic oxides dissolve in water to produce basic solutions.
Is MgO a basic or acidic oxide?
basic
Which of the two, metals or non-metals, tend to gain electrons to form negative ions (anions) instead of losing electrons to form positive ions?
Non-metals
What are the 3 most electronegative elements?
F, O, N
What is electronegativity?
Electronegativity is defined as the attraction of an atom for a bonding pair of electrons.
What is the first ionisation energy?
The first ionisation energy is the energy required to remove one mole of electrons from one mole of gaseous atoms to form one mole of gaseous 1+ ions.
What is the effective nuclear charge of sodium (Z = 11)?
+1
The elements are arranged in order of increasing __________.
nuclear charge or number or protons
Mg2+ and O2- are isoelectronic. What does it mean?
That they have the same number os electrons
Is the chlorine anion (Cl-) radius bigger or smaller than the chlorine neutral atom radius?
bigger
Is the sodium cation (Na+) radius bigger or smaller than the sodium neutral atom radius?
smaller
Atomic radius increase from ______ to _______ in the same group.
top to bottom
Which of the following IS NOT a periodic trend: bond enthalpy, atomic radius or effective nuclear charge?
bond enthalpy
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