2.4. Ion and ionic bonds
A subsection of Chemistry, 5070, through 2. Atoms, elements and compounds
Listing 10 of 50 questions
Table 9.1 shows the melting points and relative electrical conductivities of three elements. Table 9.1 carbon magnesium phosphorus melting point / °C relative electrical conductivity of solid good good poor Use ideas about structure and bonding to explain: the difference in the melting points of magnesium and phosphorus the difference in the electrical conductivities of graphite and phosphorus. Diamond and graphite are different forms of carbon. Explain, in terms of its structure and bonding, why diamond is used in cutting tools. A compound of phosphorus, oxygen and chlorine contains 20.2% phosphorus, 10.4% oxygen and 69.4% chlorine by mass. Deduce the empirical formula of this compound. empirical formula
5070_w23_qp_21
THEORY
2023
Paper 2, Variant 1
View
Table 9.1 shows the melting points and relative electrical conductivities of three elements. Table 9.1 calcium carbon iodine melting point / °C relative electrical conductivity of solid good poor poor Use ideas about structure and bonding to explain: the difference in the melting points of diamond and iodine the difference in the electrical conductivities of calcium and iodine. Diamond and graphite are different forms of carbon. Explain, in terms of its structure, why graphite is a lubricant. A compound of sodium, iodine and oxygen contains 11.62% sodium, 64.14% iodine and 24.24% oxygen by mass. Deduce the empirical formula of this compound. empirical formula
5070_w23_qp_22
THEORY
2023
Paper 2, Variant 2
View
Questions Discovered
50