How many of the following species have bond order = 1 and are paramagnetic as well?

$H{e}_2^{2+};O_2^{2-};N{e}_2^{2+};F_2;B_2;H_2;O_2^{2+}$

<p><span lang="EN-IN">B₂ have bond order equal to 1 and also paramagnetic.</span></p><p><span lang="EN-IN"><span class="mathml" contenteditable="false"> <math> <mrow> <mi>H</mi> <msubsup> <mrow> <mi>e</mi> </mrow> <mrow> <mn>2</mn> </mrow> <mrow> <mn>2</mn> <mo>+</mo> </mrow> </msubsup> <mo></mo> <mtext> </mtext> <msubsup> <mrow> <mi>O</mi> </mrow> <mrow> <mn>2</mn> </mrow> <mrow> <mn>2</mn> <mo>−</mo> </mrow> </msubsup> <mo></mo> <mtext> </mtext> <mi>N</mi> <msubsup> <mrow> <mi>e</mi> </mrow> <mrow> <mn>2</mn> </mrow> <mrow> <mn>2</mn> <mo>+</mo> </mrow> </msubsup> <mo></mo> <mtext> </mtext> <msub> <mrow> <mi>F</mi> </mrow> <mrow> <mn>2</mn> </mrow> </msub> <mo></mo> <mtext> </mtext> <msub> <mrow> <mi>H</mi> </mrow> <mrow> <mn>2</mn> </mrow> </msub> </mrow> </math> </span>have bond order equal to 1 but are diamagnetic.</span></p><p><span lang="EN-IN"><span class="mathml" contenteditable="false"> <math> <mrow> <msubsup> <mrow> <mi>O</mi> </mrow> <mrow> <mn>2</mn> </mrow> <mrow> <mn>2</mn> <mo>+</mo> </mrow> </msubsup> </mrow> </math> </span>have bond order equal to 3.</span></p>

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