Home
Class 10
CHEMISTRY
In the modern periodic table, 'A' and 'B...

In the modern periodic table, 'A' and 'B' are two elements belonging to first and seventeenth group respectively and both of them belong to the third period. Write their electronic configuration. Which of them is a metal? Why? Write the chemical formula of the compound obtained when these two elements react with each other.

Text Solution

Verified by Experts

The two elements belongs to first and seventeenth group and third period is .A.. Sodium (Na) and .B. - Chlorine (CI)
Na : 2,8, 1
CI: 2, 8, 7
A(Sodium) will be the metal, because it has a single electron in its outer shell, which readily donates, creating a positively charged ion the Na cation.
`Na^(+) + Cl^(-) to NaCl`
When sodium reacts with chlorine to get sodium chloride.
Promotional Banner

Topper's Solved these Questions

  • DEPARTMENTAL MODEL QUESTION PAPER - 2

    CPC CAMBRIDGE PUBLICATION|Exercise ANSWER THE FOLLOWING QUESTIONS|37 Videos

  • DEPARTMENTAL MODEL QUESTION PAPER - 1

    CPC CAMBRIDGE PUBLICATION|Exercise ANSWER THE FOLLOWING QUESTIONS|36 Videos

  • MARCH - 2019 QUESTION PAPER - 10

    CPC CAMBRIDGE PUBLICATION|Exercise QUESTIONS|40 Videos

Similar Questions

Explore conceptually related problems

If you look at the long form of the Periodic Table, you will find that the elements Li, Be, B, C, N, O, F, and Ne are present in the second period. Write down their electronic configuration .

Four elements P, Q, R and S belong to the third period of the Modern Periodic Table and have respectively 1,3,5 and 7 electrons in their outermost shells. Write the electronic configurations of Q and R and determine their valencies. Write the molecular formula of the compound formed when P and S combine.

List any two properties of the elements belonging to the first group modern periodic table.

The electrons in the atoms of four elements A, B, C and D are distributed in three shells having 1, 3, 5 and 7 electrons in the outermost shell respectively. State the period in which these elements can be placed in the modern periodic table. Write the electronic configuration of the atoms of A and D and the molecular formula of the compound formed when A and D combine.

(i) Atomic number of Mg and Al are 12 and 13, respectively. Write down their electronic configuration. (ii) Mention the period of the modern periodic table to which the above two elements belong. Give reason for your answer.

Name any two elements of group one and write their electronic configurations. What similarity do you observe in their electronic configurations ? Write the formula of oxide of any of the above said element.

The atomic numbers of two elements A and B are 11 and 12 respectively. Which element exhibits highest metallic property ? Why ? Write the molecular formula of the compounds formed when these elements combine with the element 'Z' having atomic number 8.

An element 'X' belongs to third period and second group of the Modern Periodic Table. (i) Write its electronic configuration. (ii) Is it a metal or non-metal? Why? (iii) Write the formula of the compound formed when 'X' reacts with an element (a) Y of electronic configuration 2, 6 and (b) Z with electronic configuration 2, 8, 7.

CPC CAMBRIDGE PUBLICATION-DEPARTMENTAL MODEL QUESTION PAPER - 2-ANSWER THE FOLLOWING QUESTIONS
  1. In the following circuit, which device can be connected in place of AB...

    Text Solution

    |

  2. Draw the ray diagram showing the image formation by a convex lens, whe...

    Text Solution

    |

  3. The reaction between lead nitrate and potassium iodide solutions is an...

    Text Solution

    |

  4. a) An object is kept between centre of curvature and principal focus o...

    Text Solution

    |

  5. (a) Give any two examples for refraction of light in daily life. Stat...

    Text Solution

    |

  6. In the modern periodic table, 'A' and 'B' are two elements belonging t...

    Text Solution

    |

  7. ""(6)^(12C and ""(6)^(14)C are two elements. Do both these elements g...

    Text Solution

    |

  8. Observe the following chemical reactions i) Fe2O3 + 2Al to 2Fe + A...

    Text Solution

    |

  9. How is the end product of nutrition glucose breaks down among all the ...

    Text Solution

    |

  10. Explain the methods of i) Oxygen supply to the cells ii) Release of ca...

    Text Solution

    |

  11. Draw the diagram showing longitudinal section of human brain and label...

    Text Solution

    |

  12. An electric motor is taken out from a toy ear. How do you convert this...

    Text Solution

    |

  13. Which ancient systems of water harvesting can be rejuvenated? What is ...

    Text Solution

    |

  14. "Conscious usage of natural resources nowadays is inevitable". Why? Gi...

    Text Solution

    |

  15. Two black female mice are crossed with a brown male. Later female I pr...

    Text Solution

    |

  16. a) What is Tyndall effect? Give two examples for Tyndall effect.

    Text Solution

    |

  17. a) Name the gas released at anode during chlor - alkali process and me...

    Text Solution

    |

  18. a) What happens if too much of acid is produced in the stomach? What i...

    Text Solution

    |

  19. An electric bulb is connected to a 220 V generator. The current is 0.5...

    Text Solution

    |

  20. How are general growth and sexual maturation different from each other...

    Text Solution

    |