{"common":{"save":0,"post_id":"6360","level":3,"total":10,"point":10,"point_extra":0},"segment":[{"id":"5957","mon_id":"1158798","chapter_id":"1158822","post_id":"6360","question":"<p>Nguyên t\u1ed1 R (Z=7) có công th\u1ee9c oxide cao nh\u1ea5t là <span class=\"math-tex\">$R_2O_5$<\/span>. V\u1ecb trí c\u1ee7a R trong b\u1ea3ng tu\u1ea7n hoàn là:<br \/> <br \/><br \/><br \/> <\/p>","options":["A. Chu kì 2, nhóm VA ","B. Chu kì 3, nhóm VA ","C. Chu kì 2, nhóm VB ","D. Chu kì 2, nhóm IIIA "],"correct":"1","level":"3","hint":"","answer":"<p><span style=\"color:#27ae60;\"><\/span><\/p><p>C\u1ea5u hình electron c\u1ee7a nguyên t\u1eed nguyên t\u1ed1 R (Z = 7): <span class=\"math-tex\">$1s^22s^22p^3$<\/span><\/p><p>S\u1ed1 th\u1ee9 t\u1ef1 ô = s\u1ed1 electron = 7.<\/p><p>S\u1ed1 th\u1ee9 t\u1ef1 chu kì = S\u1ed1 l\u1edbp electron = 2.<\/p><p>Electron cu\u1ed1i cùng \u0111i\u1ec1n vào phân l\u1edbp p \u27f9 Nguyên t\u1ed1 R thu\u1ed9c nhóm A.<\/p><p>S\u1ed1 th\u1ee9 t\u1ef1 nhóm A = S\u1ed1 electron l\u1edbp ngoài cùng = 5.<\/p><p>Nguyên t\u1ed1 R \u1edf ô 7, chu kì 2, nhóm VA.<\/p><p>\u0110áp án \u0111úng là <strong><span style=\"color:#16a085;\">A. Chu kì 2, nhóm VA.<\/span><\/strong><\/p><p style=\"text-align:justify; margin-bottom:11px\"><span style=\"color:#27ae60;\"><\/span><\/p>","type":"choose","extra_type":"classic","user_id":"147","test":"0","date":"2022-11-15 01:54:47","option_type":"txt","len":2},{"id":"5958","mon_id":"1158798","chapter_id":"1158822","post_id":"6360","question":"<p>Nguyên t\u1ed1 R thu\u1ed9c nhóm A, chu kì 3, t\u1ea1o \u0111\u01b0\u1ee3c oxit cao nh\u1ea5t có công th\u1ee9c <span class=\"math-tex\">$RO_3$<\/span>. Trong h\u1ee3p ch\u1ea5t khí v\u1edbi hydro ph\u1ea7n tr\u0103m kh\u1ed1i l\u01b0\u1ee3ng c\u1ee7a R b\u1eb1ng 94,18%. V\u1ecb trí c\u1ee7a R trong b\u1ea3ng tu\u1ea7n hoàn là?<\/p>","options":["A. Chu kì 3, nhóm VA ","B. Chu kì 3, nhóm VIA ","C. Chu kì 3, nhóm VIB ","D. Chu kì 3, nhóm IIIA "],"correct":"2","level":"3","hint":"","answer":"<p><span style=\"color:#27ae60;\"><strong>\u0110áp án \u0111úng là: B<\/strong><\/span><br \/>Oxide cao nh\u1ea5t có công th\u1ee9c <span class=\"math-tex\">$RO_3$<\/span> thì h\u1ee3p ch\u1ea5t khí v\u1edbi hydro có công th\u1ee9c <span class=\"math-tex\">$RH_2$<\/span>.<br \/><span class=\"math-tex\">${R\\over {R+2}}= 0,9418 \\Rightarrow R = 32$<\/span> là nguyên t\u1ed1 S (l\u01b0u hu\u1ef3nh)<\/p>","type":"choose","extra_type":"classic","user_id":"147","test":"0","date":"2022-11-15 01:59:12","option_type":"txt","len":2},{"id":"5959","mon_id":"1158798","chapter_id":"1158822","post_id":"6360","question":"<p>Nguyên t\u1ed1 R thu\u1ed9c nhóm IIA, t\u1ea1o \u0111\u01b0\u1ee3c oxide cao nh\u1ea5t trong \u0111ó ph\u1ea7n tr\u0103m kh\u1ed1i l\u01b0\u1ee3ng c\u1ee7a R b\u1eb1ng 60,0%. Tính ch\u1ea5t c\u1ee7a R là?<\/p>","options":["A. Tính kim lo\u1ea1i","B. Tính phi kim","C. Tính acid","D. Tính base"],"correct":"1","level":"3","hint":"","answer":"<p><span style=\"color:#27ae60;\"><strong> \u0110áp án \u0111úng là: A<\/strong><\/span><br \/>Nguyên t\u1ed1 R thu\u1ed9c nhóm IIA, t\u1ea1o \u0111\u01b0\u1ee3c oxide cao nh\u1ea5t có công th\u1ee9c RO<br \/><span class=\"math-tex\">${R\\over6}={60\\over40} \\Rightarrow R = 24$<\/span> là nguyên t\u1ed1 Mg <\/p>","type":"choose","extra_type":"classic","user_id":"147","test":"0","date":"2022-11-15 02:01:06","option_type":"txt","len":2}]}