Answer:
A group 1
Explanation:
Group 1
reactivity <u>decreases</u> as you go from L to R or downward on the periodic table
The molecular formula for what you described is N2O4, otherwise known as <span>dinitrogen tetroxide. It is very useful as a synthesizing reagent, and also as an oxidizer which is why it is used in rocket propulsion engineering. </span>
5f− inner transition series of elements are placed separately at the bottom of the periodic table. Reason: (i) This prevents the undue expansion of the periodic table i.e., maintains its structure. (ii) This preserves the principle of classification by keeping elements with similar properties in a single column.
<h3>What is the difference between transition and inner transition elements?</h3>
The main difference between transition metals and inner transition metals is that transition metal atoms have their valence electrons in the outermost d orbital whereas inner transition metal atoms have their valence electrons in the f orbital of the inner penultimate electron shell.
<h3>How many inner transition elements are there?</h3>
Total number of inner transition elements in periodic table is 28, 14 each in lanthanoid and actinioid series.
Learn more about inner transition metals here:
<h3>
brainly.com/question/13632319</h3><h3 /><h3>#SPJ4</h3>
There are 640 muscles in the human body
.500 mol ( 6.02x10^23 molecules/1 mol) = 3.01x10^23
