The electronic configuration of an element Z is 2, 8, 8.(a) What is the atomic number of the element?(b) State whether element Z is a metal or a non-metal.(c) What type of ion (if any) will be formed by an atom of element Z? Why?(d) What is special about the outermost electron shell of the atom of this element?(e) Give the name and symbol of element Z.(f) Name the group of elements to which Z belongs.
(a) Atomic no. of the element = 18.
(b) Element Z is a non-metal
(c) Element Z will not form any ion because its outermost shell is complete.
(d) Outermost electronic shell of the atom of this element is completely filled with electrons.
(e) Name of element Z is Argon.
Its symbol is Ar.
(f) Z belongs to the noble gases group or the zero group of the periodic table.
Related Articles
- The atom of an element X has 7 electrons in its M shell.(a) Write the electronic configuration of element X.(b) What is the atomic number of element X?(c) Is it a metal or a non-metal?(d) What type of ion will be formed by an atom of element X? Write the symbol of the ion formed.(e) What could element X be?
- An atom of element E contains 3 protons, 3 electrons and 4 neutrons :(a) What is its atomic number?(b) What is its mass number?(c) Write the electronic configuration of the element E.(d) State whether element E is a metal or non-metal. Why?(e) What type of ion, cation or anion, will be formed by an atom of element E? Why?(f) Write the symbol of the ion formed by an atom of element E.(g) What could element X be?
- An element Z forms an oxide ZO3.(a) What is the valency of element Z?(b) What will be the formula of fluoride of Z?
- An element has Z = 7. What is the valency of the element? Also name the element.
- Write the distribution of electrons in an atom of element whose atomic number is 18. What is special about the outermost electron shell (or valence shell) of the atom of this element?
- An element Z has a valency of 3. What is the formula of oxide of Z?
- If Z = 3, what would be the valency of the element? Also, name the element.
- If the number of electrons in an ion Z3– is 10, the atomic number of element Z will be :(a) 7 (b) 5 (c) 10 (d) 8
- The electronic configurations of three elements X, Y, and Z are X - 2,8; Y - 2, 8, 7 and Z - 2, 8, 2. Which of the following is correct?(a) X is a metal(b) Y is a metal(c) Z is a non-metal(d) Y is a non-metal and Z is a metal
- For an element, Z = 9. The valency of this element will be :(a) 4 (b) 2 (c) 1 (d) 3
- An element X belongs to the 3rd period and group 2 of the periodic table. State:(a) number of valence electrons (b) valency (c) metal or non-metal (d) name of the element
- An atom of an element X may be written as 94X.(a) What does the figure 9 indicate?(b) What does the figure 4 indicate?(c) What is the number of protons in atom X?(d) What is the number of neutrons in atom X?(e) What is the number of electrons in atom X?(f) How many electrons are there in the outermost shell of an atom of element X?(g) Write the symbol of ion formed by an atom of element X.
- An element X from group 2 of the periodic table reacts with an element Y from group 17 to form a compound.(a) What is the nature of the compound formed?(b) State whether the compound formed will conduct electricity or not.(c) Give the formula of the compound formed.(d) What is the valency of element X?(e) How many electrons are there in the outermost shell of an atom of element Y?
- The atom of an element X contains 17 protons, 17 electrons, and 18 neutrons whereas the atom of an element Y contains 11 protons, 11 electrons, and 12 neutrons.(a) What type of ion will be formed by an atom of element X ? Write the symbol of the ion formed.(b) What will be the number of (i) protons (ii) electrons, and (iii) neutrons, in the ion formed from X?(c) What type of ion will be formed by an atom of element Y ? Write the symbol of the ion formed.(d) What will be the number of (i) protons (ii) electrons, and (iii) neutrons, in the ion formed from Y?(e) What is the atomic mass of (i) X, and (ii) Y?(f) What could the elements X and Y be?
- How can the valency of an element be determined if its electronic configuration is known? What will be the valency of an element of atomic number 9?
Kickstart Your Career
Get certified by completing the course
Get Started