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Explain the decrease in reactivity of Group 2 elements as you go down the periodic table

Group 2 elements are metals that all form cations in a chemical reaction. This means they lose their valence electrons to become positive (2+) ions. Their reactivity depends on how easily the atoms can lose ...
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Answered by Hannah S. • Chemistry tutor
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How many protons, neutrons and electrons are present in a Lithium (Li+) ion?

On a periodic table, we can see that the atomic number for lithium is 3. The atomic number represents the number of protons in an atom, so Lithium has 3 protons. The atomic mass is the number of protons and ...
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Answered by Oliver K. • Chemistry tutor
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What is a Bronsted-Lowry acid?

A Bronsted-Lowry acid is a proton donor. This means that a hydrogen atom in the molecule can dissociate in aqueous solution to form a H+ ion, and leaving a negatively charged anion.
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Answered by Abigael B. • Chemistry tutor
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What type of reaction do haloalkanes undergo with nucleophiles?

Halogens are electronegative than the adjacent carbon atoms in haloalkanes.Therefore they have a tendency to attract the pair of electrons in a covalent bond, forming a polar bond.The carbon becomes electron...
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When 80.0cm^3 of 0.500 M hydrochloric acid was added to 1.75g of impure CaCO3, not all HCl reacts. The unreacted HCl required 22.4 cm^3 of a 0.500 M solution of NaOH for complete reaction. Calculate percentage by mass of CaCO3 in the impure sample.

Balanced equations: CaCO 3 + 2 HCl --> CaCl 2 + H 2 O + CO 2 , HCl + NaOH --> NaCl + H 2 O HCl moles that react overall: (80.0 cm 3 x 0.500 mol dm 3 ) / 1000 dm 3 cm -3 = 4.00 x 10 -2 mol HCl moles tha...
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