Search SchoolNGR

Chemistry Past Questions and Answers

Classroom

Chemistry Questions

Question 1606:

Which of the following questions is correct about the periodic table?

SchoolNGR Classroom

A The non-metallic properties of the elements tend to decrease across each period
B The valence electrons of the elements increase progressively across the period
C Elements in the same group have the same numbeer of electron shells
D Elements in the same period have the number of valence electrons

View Answer & Explanation

Question 1607:

The relative atomic mass of a naturally occurring lithium consisting of 90% \(^7 _3\)Li and \(^6 _3\)10% Li is

SchoolNGR Classroom

A 6.9
B 7.1
C 6.2
D 6.8

View Answer & Explanation

Question 1608:

An isotope has an atomic number of 15 and a mass number of 31. The number of protons it contain is

SchoolNGR Classroom

A 16
B 15
C 46
D 31

View Answer & Explanation

Question 1609:

The molecular lattice of iodine is held together by

SchoolNGR Classroom

A Dative bond
B Metallic bond
C Hydrogen bond
D Van der Waal's forces

View Answer & Explanation

Question 1610:

The arrangement of particles in crystal lattices can be studied using

SchoolNGR Classroom

A X - rays
B γ - rays
C Î± - rays
D Î² - rays

View Answer & Explanation

Stay Updated

Follow us on:

Subjects