https://innovationcenter.bg/blog 0.80 https://innovationcenter.bg/obratno-obazhdane 0.80 https://innovationcenter.bg/contact 0.80 https://innovationcenter.bg/dzi-po-bel 0.80 https://innovationcenter.bg/zapisvane 0.80 https://innovationcenter.bg/ 1.00 https://innovationcenter.bg/intenziven-kurs-po-BEL-12-klas 0.80 https://innovationcenter.bg/intenziven-kurs-po-himiya-i-biologiq 0.80 https://innovationcenter.bg/uroci-po-himiya 0.80 https://innovationcenter.bg/uroci-po-biologiya 0.80 https://innovationcenter.bg/godishni-kursove-po-himiya-i-biologiya 0.80 https://innovationcenter.bg/za-nas 0.80 https://innovationcenter.bg/leten-kurs-po-himiya-i-biologiya 0.80 https://innovationcenter.bg/kurs-po-bel-za-matura-sled-10-i-12-klas 0.80 https://innovationcenter.bg/kurs-po-bel-za-matura-sled-12-klas 0.80 https://innovationcenter.bg/individualni-uroci 0.80 https://innovationcenter.bg/uchenicheski-kurs-po-himiya-i-biologiq 0.80 https://innovationcenter.bg/faq 0.80 https://innovationcenter.bg/landings/intenziven-kurs-po-himiya-i-biologiq 0.80 https://innovationcenter.bg/kurs-po-bel-za-nvo-sled-7-klas 0.80 https://innovationcenter.bg/chastni-uroci-po-himiya 0.80 https://innovationcenter.bg/chastni-uroci-po-biologiya 0.80 https://innovationcenter.bg/probni-maturi-po-bel-za-12-klas 0.80 https://innovationcenter.bg/pravila-za-povedenie 0.80 https://innovationcenter.bg/privacy 0.80 https://innovationcenter.bg/cookies 0.80 https://innovationcenter.bg/plashtaniya-i-otstapki 0.80 https://innovationcenter.bg/uspeshni-istorii 0.80 https://innovationcenter.bg/video-uroci 0.80 https://innovationcenter.bg/dzi-po-bel/2026-maj 0.70 https://innovationcenter.bg/dzi-po-bel/2025-avgust 0.70 https://innovationcenter.bg/dzi-po-bel/2025-maj 0.70 https://innovationcenter.bg/dzi-po-bel/2024-maj 0.70 https://innovationcenter.bg/dzi-po-bel/2023-avgust 0.70 https://innovationcenter.bg/dzi-po-bel/2023-maj 0.70 https://innovationcenter.bg/dzi-po-bel/2022-avgust 0.70 https://innovationcenter.bg/dzi-po-bel/2022-maj 0.70 https://innovationcenter.bg/dzi-po-bel/tema/pravopis 0.70 https://innovationcenter.bg/dzi-po-bel/tema/gramatika 0.70 https://innovationcenter.bg/dzi-po-bel/tema/punktuaciya 0.70 https://innovationcenter.bg/dzi-po-bel/tema/chetene 0.70 https://innovationcenter.bg/dzi-po-bel/tema/literatura 0.70 https://innovationcenter.bg/video-uroci/pravilo-na-klechkovski 2026-11-13 0.70 https://innovationcenter.bg/videos/video-uroci/pravilo-na-klechkovski.jpg Правило на Клечковски: защо калият прескача слой Защо 19-ият електрон на калия отива в 4s, а не в 3d? Правилото на Клечковски (n + l) във видео за 55 секунди, с пример и въпрос за проверка. https://innovationcenter.bg/videos/video-uroci/pravilo-na-klechkovski.mp4?v=1 55 2026-11-13T10:00:00+02:00 https://innovationcenter.bg/video-uroci/radioaktivnost-bekerel 2026-11-13 0.70 https://innovationcenter.bg/videos/video-uroci/radioaktivnost-bekerel.jpg Как е открита радиоактивността: кристалът на Бекерел През 1896 г. Анри Бекерел открива, че уранов кристал облъчва фотографска плака на тъмно. Какво е радиоактивност и защо атомът не е „неделим“ – видео за 45 секунди. https://innovationcenter.bg/videos/video-uroci/radioaktivnost-bekerel.mp4?v=1 45 2026-11-13T10:00:00+02:00 https://innovationcenter.bg/video-uroci/opitat-na-radarford 2026-11-13 0.70 https://innovationcenter.bg/videos/video-uroci/opitat-na-radarford.jpg Опитът на Ръдърфорд със златното фолио Алфа частици обстрелват тънко златно фолио: почти всички минават, а около 1 на 10 000 отскача назад. Какво показва опитът на Ръдърфорд за строежа на атома. https://innovationcenter.bg/videos/video-uroci/opitat-na-radarford.mp4?v=1 44 2026-11-13T10:00:00+02:00 https://innovationcenter.bg/video-uroci/atomat-e-prazno-prostranstvo 2026-11-13 0.70 https://innovationcenter.bg/videos/video-uroci/atomat-e-prazno-prostranstvo.jpg Колко голям е атомът: ядрото и празното пространство Ако ядрото е топче от 1 см, атомът е голям колкото стадион. Мащабът на атома и планетарният модел на Ръдърфорд – видео за 40 секунди. https://innovationcenter.bg/videos/video-uroci/atomat-e-prazno-prostranstvo.mp4?v=1 40 2026-11-13T10:00:00+02:00 https://innovationcenter.bg/video-uroci/zashto-elektronat-ne-pada-v-yadroto 2026-11-13 0.70 https://innovationcenter.bg/videos/video-uroci/zashto-elektronat-ne-pada-v-yadroto.jpg Защо електронът не пада в ядрото: първият постулат на Бор По старата физика електронът би паднал върху ядрото за по-малко от милиардна част от секундата. Как Нилс Бор обяснява стабилността на атома – видео за 45 секунди. https://innovationcenter.bg/videos/video-uroci/zashto-elektronat-ne-pada-v-yadroto.mp4?v=1 45 2026-11-13T10:00:00+02:00 https://innovationcenter.bg/video-uroci/kakvo-e-kvant 2026-11-13 0.70 https://innovationcenter.bg/videos/video-uroci/kakvo-e-kvant.jpg Какво е квант: кой оцветява фойерверките Червено от стронций, зелено от барий: цветът идва от електрон, който скача между орбитите. Вторият постулат на Бор, квантите и E = hν – видео за 46 секунди. https://innovationcenter.bg/videos/video-uroci/kakvo-e-kvant.mp4?v=1 46 2026-11-13T10:00:00+02:00 https://innovationcenter.bg/video-uroci/protoni-neutroni-masovo-chislo 2026-11-13 0.70 https://innovationcenter.bg/videos/video-uroci/protoni-neutroni-masovo-chislo.jpg Протони, неутрони и масово число: Z, N и A Какво има в атомното ядро и как се смятат неутроните: Z е броят на протоните, N – на неутроните, A = Z + N. С пример за натрий и задача – видео за 55 секунди. https://innovationcenter.bg/videos/video-uroci/protoni-neutroni-masovo-chislo.mp4?v=1 55 2026-11-13T10:00:00+02:00 https://innovationcenter.bg/video-uroci/ne-znam-ili-neznam 2026-11-13 0.70 https://innovationcenter.bg/videos/video-uroci/ne-znam-ili-neznam.jpg „Не знам“ или „незнам“ – как се пише Правилно е „не знам“ – частицата „не“ се пише отделно от глаголите. Кога все пак е слято („ненавиждам“): правило, капан и въпрос за проверка във видео за 30 секунди. https://innovationcenter.bg/videos/video-uroci/ne-znam-ili-neznam.mp4?v=1 30 2026-11-13T10:00:00+02:00 https://innovationcenter.bg/video-uroci/imam-predvid-ili-v-predvid 2026-11-13 0.70 https://innovationcenter.bg/videos/video-uroci/imam-predvid-ili-v-predvid.jpg „Имам предвид“ или „имам в предвид“ – кое е правилно Правилно е „имам предвид“ – „предвид“ е една дума, без „в“ и без „на“ пред нея. Същото важи за „наясно“, „всъщност“ и „наистина“. Видео за 27 секунди. https://innovationcenter.bg/videos/video-uroci/imam-predvid-ili-v-predvid.mp4?v=1 27 2026-11-13T10:00:00+02:00 https://innovationcenter.bg/video-uroci/palen-ili-kratak-chlen 2026-11-13 0.70 https://innovationcenter.bg/videos/video-uroci/palen-ili-kratak-chlen.jpg Пълен или кратък член – как да познаеш „Учителят каза“, но „видях учителя“. Лесна проверка за пълен и кратък член: пробвай с „той“ или с „него“. Правило, примери и въпрос във видео за 30 секунди. https://innovationcenter.bg/videos/video-uroci/palen-ili-kratak-chlen.mp4?v=1 30 2026-11-13T10:00:00+02:00 https://innovationcenter.bg/video-uroci/protsenti-naum 2026-11-13 0.70 https://innovationcenter.bg/videos/video-uroci/protsenti-naum.jpg Проценти наум: 18% от 50 за три секунди x% от y е същото като y% от x. Затова 18% от 50 = 50% от 18 = 9. Трик за смятане на проценти наум, с втори пример и задача – видео за 36 секунди. https://innovationcenter.bg/videos/video-uroci/protsenti-naum.mp4?v=1 36 2026-11-13T10:00:00+02:00 https://innovationcenter.bg/video-uroci/umnozhenie-po-11-naum 2026-11-13 0.70 https://innovationcenter.bg/videos/video-uroci/umnozhenie-po-11-naum.jpg Умножение по 11 наум: 43 × 11 за три секунди Разделяш цифрите и между тях пишеш сбора им: 43 × 11 = 473. Какво става, когато сборът е над 9 (78 × 11 = 858) – видео за 32 секунди. https://innovationcenter.bg/videos/video-uroci/umnozhenie-po-11-naum.mp4?v=1 32 2026-11-13T10:00:00+02:00 https://innovationcenter.bg/video-uroci/kvadrat-na-chislo-zavarshvashto-na-5 2026-11-13 0.70 https://innovationcenter.bg/videos/video-uroci/kvadrat-na-chislo-zavarshvashto-na-5.jpg Квадрат на число, което завършва на 5: 35² наум Умножаваш цифрата на десетиците по следващото число и дописваш 25: 35² = 3 × 4 и 25 = 1225. 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