The GHS (Globally Harmonised System of Classification and Labelling of Chemicals) elements for magnesium oxide, copied below, show that it is (from left to right) a Blank 5 Question 2 and an Blank 6 Question 2 .

Magnesium oxide (CAS Number 1309-48-4) has a Chemwatch Hazard Alert Code of Blank 4 Question 2 . The GHS (Globally Harmonised System of Classification and Labelling of Chemicals) elements for magnesium oxide, copied below, show that it is (from left to right) a Blank 5 Question 2 and an Blank 6 Question 2 . If magnesium oxide is ingested Blank 7 Question 2 induce vomiting.

What is the chemical formula for magnesium oxide:Group of answer choicesMg₂OMgO₂Mg₂O₃MgO

What is the formula for an ionic compound made of magnesium and sulfurGroup of answer choicesMgSMgS2Mg2SMg2S3none of the above.

The oxidation number of magnesium in magnesium chloride is ____.Group of answer choices0–1+1+2

(a) Study the information in the table below and answer the questions that follow. Theletters do not represent the actual symbols of theelements.Element Atomic number Melting pointofelementFormula ofchlorideMelting pointof chlorideG 11 98 GCI 801H 12 650 HCl 2 715J 14 1410 JCl 4 -70K 16 113 K 4 Cl 2 -80L 20 851 LCl 2 780(i) Which elements are metals? Giveareason (2marks)........................................................................................................................................................................................................................................................................(ii) Write the formula of the compound formed when element H reacts withelement(1 mark)....................................................................................................................................(iii) Explain why the melting point of J is higher than thatof K (2marks)............................................................................................................................................................................................................................................................................................................................................................................................................(iv) What is the oxidation state of J initschloride? (1mark)....................................................................................................................................(v) How doesthe:-Melting point of the fluoride of G compare with that of its chloride?10Explain (2marks)............................................................................................................................................................................................................................................................................................................................................................................................................-Reactivity of H and L with water compare? Giveanexplanation