About

“We must trust to nothing but facts: These are presented to us by Nature, and cannot deceive. We ought, in every instance, to submit our reasoning to the test of experiment, and never to search for truth but by the natural road of experiment and observation.” ― Antoine Lavoisier, Elements of Chemistry

Monday, 6 April 2015

Periodic Table Worksheet-fill in the blank

Periodic Table Worksheet 1
Fill in the gaps by choosing the following words

 1      2      atomic      disimilar      dull      electronic      elements      equals      few      good      group      high      low      mass      metals      neon      non-metals      outer      period      poor      potassium      proton      shiny      similar      sodium      transition   

1. The chemical elements in the Periodic Table were originally arranged in order of their atomic ………………….

2. This list can then be arranged in rows so that elements with……………………………. properties are in the same vertical column, known as a………………………………………….

3. The horizontal row is called a…………………………….

4. In the modern periodic table elements are arranged in order of their atomic or…………………………………. number.

5. Argon is more like helium or ……………………………….. and not a bit like potassium.

6. Similarly potassium is more like lithium and ……………………………………. and so is better placed in Group ………………………………..  the "Alkali Metals"

7. The periodic table can also be seen as an arrangement of the elements in terms of their ……………………………….. structure.

8. Elements in the same group have the same number of …………………………………….. electrons.

9.  More than three-quarters of the elements of the periodic table are…………………………………….

10. They are mainly found in the left hand columns (Group 1 and Group………………………………) and in the central blocks of …………………………………. metals.

11. They tend to be ……………………………………. in appearance, ……………………………………. conductors of heat and electricity and the melting and boiling points and densities tend to be …………………………………

12. About one quarter of the elements are………………………………….. and these can be gases, liquids or solids.

13.  The solids tend to be …………………………….. in appearance and are ………………………….. conductors of heat and electricity. The boiling points and melting points and densities tend to be relatively…………………………...

source: docbrown

0 komentar:

Post a Comment