(i) Describe how the melting point of these elements varies across the period...[2](ii)Describe and explain the trend in atomic radius for the elements sodium to chlorine.trend explanation■■..[2](b) State the structure and bonding present in the elements sodium, silicon and chlorine.How...
In terms of atomic number, elements follow the ascending order for their arrangement in the periodic table. It comprises several rows and columns of elements.Answer and Explanation: The periodic table has horizontally arranged rows and vertically arranged columns named as periods and groups. Th...
Values are given to an accuracy of about 5 pm.Image showing periodicity of the chemical elements for atomic radius (empirical) in a periodic table cityscape style.Image showing periodicity of the chemical elements for atomic radius (empirical) in a periodic table heatscape style....
Why does atomic radius decrease across a period on the periodic table of elements? Atomic radius decreases across a period on the periodic table because, when moving from left to right across a row, there are more electrons in the valence shell and more protons in the nucleus. These additiona...
3. Atomic size: Atomic size is measured in terms of atomic radius that is defined as the distance between the centre of the atomic nucleus and the outermost shell of an isolated atom. It is generally expressed in picometer, pm. \(\left({1\,{\text{pm}} = {{10}^{ – 12}}~{\...
Many references give table of atomic radii. Sometimes in text books and other sources, the rather vague term "atomic radius" is not defined and in such cases it is therefore not clear what the values actually mean. The values given here for atomic radius are calculated values using methods ...
Using only the periodic table, determine which element in each set has the lowest EN and which has the highest. 1. (N, Br, I) 2. (H, Ca, F) Arrange the elements Na, Si, and S in order of increasing atomic radius. Order the element S, Cl, and F of increasing atomic ...
The first Mendeleev periodic table, 1869. A few years later, British chemist John Newlands also arranged the elements in order of increasing atomic weights. He was apparently the first to assign hydrogen the weight of "1." Newlands noted that properties repeated when the sequence was broken in...
1. Understand the Terms: - A period is a horizontal row in the periodic table. - A group is a vertical column in the periodic table. 2. Identify the Trend: - In a period, as you move from left to right, the atomic number of the elements increases. This means that more protons...
The periodic properties are those that arise from the periodic table. The periodic table displays the elements according to their atomic number and their periodic properties. The latter are those properties related to the periods and groups of the table. The periodic properties are the...