Answer:
石+八+一+⺓ SEKI, SHAKU, ishi - stone / HACHI, ya(ttsu), ya(tsu), ya, yo - eight / ICHI, ITSU, hito(tsu) - one / The "Itogashira" radical - young, slight
日+ケ+門 NICHI, JITSU, hi, ka - sun, day / Katakana "Ke" / MON, kado - gate
目+木+ケ MOKU, me - eye / MOKU, BOKU, ki - tree / Katakana "Ke"
⼍+月+ナ+え+⼚+冂 The "Wakanmuri" radical - cover, crown / GETSU, GATSU, tsuki - moon, month / Katakana "Na" / Hiragana "E"or The "Shinnyou" radical - road, walk, to advance / The "Gandare" radical - cliff / The "Keigamae" radical - to enclose
ニ+口+｜+ユ+八 Katakana "Ni" or NI, futa(tsu), futa - two / KOU, kuchi - mouth / The "Tatebou" radical - vertical stroke / Katakana "Yu" / HACHI, ya(ttsu), ya(tsu), ya, yo - eight
They all make another character if the same radical is used more than once.
磁 JI - magnetism, porcelain
簡 KAN - simple, brief
箱 hako - box
髄 ZUI - marrow
誤 GO, ayama(ru) - err, make a mistake