What happens as you go down Group 2?
Ionisation energies decrease down the group. This is because each element down group 2 has an extra electron shell, so the outer shell electrons are further away from the nucleus which ultimately means a reduced nuclear attraction (the attraction between the positive nucleus and negative electrons).
What is the difference between group 1 and group 2?
The fundamental difference in electronic configuration between group 1 and group 2 elements is that, group 1 elements have one valence electron whereas group 2 elements have two valence electrons. General Properties of group 1 elements: (i) They react with water vigorously to form strong alkali hydroxides.
What is the difference between group 1 and group 2 exam?
Group 1 are the honor (high position) jobs through the SSC where as Group 2 are the clerical or the junior positions. The two groups are administered by the SSC and is mainly for the state government level recruitment, hence may differ in the eligibility, requirements and procedure.
Which is easier Group 1 or 2?
It is easy to clear Group 2 as more practical subjects in Group-1 will help you fetch your aggregate of Group 2. As you want 350 for clearing both groups. Scoring 120 in Group 2 will be enough if you can score 230 in Group 1 which is easier to achieve than 150 in Group 2 as individual subject.
Is Group 1 and civils are same?
Civil services examinations are held at national levels conducted by Union Public Service Examination. On the basis of the rank, candidates are appointed as IAS, IPS, IFS. But, Group 1 exams are conducted at state level. Both he state exam and civil service exam go through three stages.
What are the similarities between group 1 and group 2 elements?
These elements are highly reactive and the reactivity of these metals increases as you go down the group. These elements also react vigorously with water. Both Group one and two metals have similar patterns.
Do Group 1 elements have high density?
Trends in Density The densities of the Group 1 elements increase down the group (except for a downward fluctuation at potassium). This trend is shown in the figure below: The metals in this series are relatively light—lithium, sodium, and potassium are less dense than water (less than 1 g cm-3).
Do group 2 elements have low density?
As with the alkali metals, the atomic and ionic radii of the alkaline earth metals increase smoothly from Be to Ba, and the ionization energies decrease. For example, the density of Ca is less than that of Be and Mg, the two lightest members of the group, and Mg has the lowest melting and boiling points.
What are three metals on the periodic table?
Most elements on the periodic table are metals. They are grouped together in the middle to the left-hand side of the periodic table. The metals consist of the alkali metals, alkaline earths, transition metals, lanthanides, and actinides.
Why is the symbol for silicon Si and not s?
As for Silicon and Sulphur, if I’m not mistaken, silicon was discovered, so as to speak, after sulphur, and thus got the symbol S and the silicon, when discovered was given the symbol Si.
What are 5 uses silicon?
Uses of Silicon
- The element is a major constituent in ceramics and bricks.
- Being a semiconductor, the element is put into use for making transistors.
- Silicon is widely used in computer chips and solar cells.
- It is a vital component of Portland cement.
- Silicon is used in the production of fire bricks.
Why is Silicon called SI?
Silicon is a chemical element with the symbol Si and atomic number 14. Because of its high chemical affinity for oxygen, it was not until 1823 that Jöns Jakob Berzelius was first able to prepare it and characterize it in pure form. Its oxides form a family of anions known as silicates.
Is silicone a metalloid?
Silicon, which has the symbol Si and atomic number 14, is the second most abundant element after oxygen in the earth’s crust. For this reason, silicon is known as a chemical analogue to carbon. But unlike carbon, silicon a metalloid — in fact, it’s the most common metalloid on earth.