The elements <a href="https://en.wikipedia.org/wiki/Moscovium" id="mwAZ4" rel="mw:WikiLink" title="Moscovium">Moscovium</a>, <a href="https://en.wikipedia.org/wiki/Tennessine" id="mwAZ8" rel="mw:WikiLink" title="Tennessine">Tennessine</a>, and <a href="https://en.wikipedia.org/wiki/Oganesson" id="mwAaA" rel="mw:WikiLink" title="Oganesson">Oganesson</a> are officially added to the <a href="https://en.wikipedia.org/wiki/Periodic_table" id="mwAaE" rel="mw:WikiLink" title="Periodic table">periodic table</a> at a conference in <a href="https://en.wikipedia.org/wiki/Moscow" id="mwAaI" rel="mw:WikiLink" title="Moscow">Moscow, Russia</a>.