What are the times shown??? I can help
There are 4 kinds of bases that make up DNA. There’s adenine, thymine, cytosine, and guanine.
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Kelvin is a temperature scale designed so that zero degrees K is defined as absolute zero (at absolute zero, a hypothetical temperature, all molecular movement stops - all actual temperatures are above absolute zero) and the size of one unit is the same as the size of one degree Celsius.
<em>Answer:</em>
- Li and K have same chemical properties
- O and Se have same chemical properties
- He and Ar have same chemical properties
<em>Explanation:</em>
According to modern periodic table, the elements present into same group group have same chemical properties due to same valence shells electrons.
<em> Li and K have same chemical properties: </em>
Both these elements are present in same group i.e group 1 known as alkali atoms. Almost all alkali metals have same chemical properties.
<em> O and Se have same chemical properties</em>
Both these elements are present in same group VI A. The elements present in same group have same chemical properties.
<em>He and Ar have same chemical properties</em>
Both these elements are present in same group VIII A called it noble gases. The elements present in same group have same chemical properties both are inert.