Do you own CA work!!
Group 2A * Known as Alkaline earth elements * All are metals * Occur only in compounds * React with oxygen in the general formula EO (where O is oxygen and E is Group 2A element)
The valence electron configuration for Group 6A elements is ns^2 np^4. This means that Group 6A elements have 6 valence electrons in their outermost shell.
The elements in group 3A and 6A show a dip in ionization energy due to the presence of a full or half-full subshell. In group 3A, elements have a stable electronic configuration when one electron is removed, resulting in a lower ionization energy. In group 6A, elements exhibit a half-filled p orbital when one electron is added, making it easier to remove an electron and thus lowering the ionization energy.
It is alternatively called the Carbon family.
Groups 6A and 7A are typically classified as the "chalcogens" and "halogens," respectively. Group 8A is known as the "noble gases."
Group 2A * Known as Alkaline earth elements * All are metals * Occur only in compounds * React with oxygen in the general formula EO (where O is oxygen and E is Group 2A element)
Since the question is 3(2a), then just write it out. 3(2a) is 2a+2a+2a or 6a.
2a-6a+9-4a+9
If you mean -2a+6a then it simplifies to 4a
6a
6a to the second power minus 8ab + 2a
6A elements, also known as group 16 elements, have 6 valence electrons. This is because they are located in group 16 of the periodic table, which corresponds to the number of valence electrons. Examples of 6A elements include oxygen, sulfur, and selenium.
5a-20+2a = 6a-11 5a+2a-6a = 20-11 1a = 9 a = 9
Nitrogen is not a member of group 6A. It belongs to group 5A on the periodic table. The other elements - oxygen, selenium, and sulfur - belong to group 6A.
Basically any element with a positive atomic number because all the electrons are paired. Ex: Group 2A, Group 4A, group 6A, and group 8A. the ions would all be paramagnetic though.
I guess you mean: 2a^2+6a Well in this case you take 2a out of the bracket and then you're left with a+3 inside. 2a(a+3a)
6a squared-8ab+2a factor completely and check mentally