{"id":48537,"date":"2019-11-11T01:33:05","date_gmt":"2019-11-11T00:33:05","guid":{"rendered":"https:\/\/www.thermal-engineering.org\/o-que-e-atom-um-atomo-e-um-espaco-vazio-definicao\/"},"modified":"2020-01-29T13:39:32","modified_gmt":"2020-01-29T12:39:32","slug":"o-que-e-atom-um-atomo-e-um-espaco-vazio-definicao","status":"publish","type":"post","link":"https:\/\/www.thermal-engineering.org\/pt-br\/o-que-e-atom-um-atomo-e-um-espaco-vazio-definicao\/","title":{"rendered":"O que \u00e9 Atom – Um \u00e1tomo \u00e9 um espa\u00e7o vazio? – Defini\u00e7\u00e3o"},"content":{"rendered":"
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Um \u00e1tomo \u00e9 um espa\u00e7o vazio?\u00a0Pode parecer que o espa\u00e7o e, de fato, o assunto esteja vazio, mas n\u00e3o est\u00e1.\u00a0Devido \u00e0 natureza qu\u00e2ntica dos el\u00e9trons.\u00a0Engenharia T\u00e9rmica<\/div>\n<\/div>\n
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Um \u00e1tomo \u00e9 um espa\u00e7o vazio?<\/h2>\n
\"volume<\/a>
Uma representa\u00e7\u00e3o figurativa do \u00e1tomo de h\u00e9lio-4 com a nuvem de el\u00e9trons em tons de cinza.\u00a0\u00c9 prov\u00e1vel que pr\u00f3tons e n\u00eautrons sejam encontrados exatamente no mesmo espa\u00e7o, no ponto central.\u00a0Fonte wikipedia.org Licen\u00e7a CC BY-SA 3.0<\/figcaption><\/figure>\n

O volume de um \u00e1tomo<\/strong>\u00a0\u00e9 cerca de\u00a015 ordens de grandeza\u00a0<\/strong>maior<\/strong>\u00a0que o volume de um n\u00facleo.\u00a0Para\u00a0o \u00e1tomo de ur\u00e2nio<\/strong>\u00a0, o\u00a0raio de Van der Waals<\/strong>\u00a0\u00e9 de cerca de\u00a0186 pm = 1,86 \u00d7\u00a010-10<\/sup>\u00a0m<\/strong>\u00a0.\u00a0O raio de Van der Waals, r\u00a0w<\/sub>\u00a0, de um \u00e1tomo \u00e9 o raio de uma esfera imagin\u00e1ria disco que representa a dist\u00e2ncia de aproxima\u00e7\u00e3o mais pr\u00f3xima para um outro \u00e1tomo.\u00a0Assumindo uma forma esf\u00e9rica, o\u00a0\u00e1tomo de\u00a0ur\u00e2nio<\/a>\u00a0tem um volume de cerca de \u00a0\u00a026,9 \u00d7\u00a010-30<\/sup>\u00a0m\u00a03<\/sup><\/strong>\u00a0.\u00a0Mas esse espa\u00e7o “enorme” \u00e9 ocupado principalmente por el\u00e9trons, porque o\u00a0n\u00facleo<\/strong>\u00a0ocupa apenas cerca de\u00a01721 \u00d7\u00a010-45<\/sup>\u00a0m3<\/sup><\/strong>\u00a0\u00a0de espa\u00e7o.\u00a0Esses el\u00e9trons juntos pesam apenas uma fra\u00e7\u00e3o (digamos 0,05%) do \u00e1tomo inteiro.<\/p>\n

Pode parecer que o espa\u00e7o e, de fato, o assunto esteja\u00a0vazio<\/strong>\u00a0,\u00a0mas n\u00e3o est\u00e1<\/strong>\u00a0.\u00a0Devido \u00e0\u00a0natureza qu\u00e2ntica dos el\u00e9trons<\/strong>\u00a0, os el\u00e9trons n\u00e3o s\u00e3o part\u00edculas pontuais, s\u00e3o espalhados por todo o \u00e1tomo.\u00a0A descri\u00e7\u00e3o cl\u00e1ssica n\u00e3o pode ser usada para descrever coisas na escala at\u00f4mica.\u00a0Na escala at\u00f4mica, os f\u00edsicos descobriram que a mec\u00e2nica qu\u00e2ntica descreve as coisas muito bem nessa escala.\u00a0Os locais das part\u00edculas na mec\u00e2nica qu\u00e2ntica n\u00e3o est\u00e3o na posi\u00e7\u00e3o exata; s\u00e3o descritos por uma\u00a0fun\u00e7\u00e3o de densidade de probabilidade<\/strong>\u00a0.\u00a0Portanto, o espa\u00e7o em um \u00e1tomo (entre el\u00e9trons e um n\u00facleo at\u00f4mico) n\u00e3o est\u00e1 vazio, mas \u00e9 preenchido por uma fun\u00e7\u00e3o de densidade de probabilidade dos el\u00e9trons (geralmente conhecida como \u201c\u00a0nuvem de el\u00e9trons<\/strong>\u00a0\u201d).<\/p>\n<\/div>\n<\/div>\n

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Este artigo \u00e9 baseado na tradu\u00e7\u00e3o autom\u00e1tica do artigo original em ingl\u00eas. Para mais informa\u00e7\u00f5es, consulte o artigo em ingl\u00eas. Voc\u00ea pode nos ajudar. Se voc\u00ea deseja corrigir a tradu\u00e7\u00e3o, envie-a para: translations@nuclear-power.com ou preencha o formul\u00e1rio de tradu\u00e7\u00e3o on-line. Agradecemos sua ajuda, atualizaremos a tradu\u00e7\u00e3o o mais r\u00e1pido poss\u00edvel. Obrigado.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

Um \u00e1tomo \u00e9 um espa\u00e7o vazio?\u00a0Pode parecer que o espa\u00e7o e, de fato, o assunto esteja vazio, mas n\u00e3o est\u00e1.\u00a0Devido \u00e0 natureza qu\u00e2ntica dos el\u00e9trons.\u00a0Engenharia T\u00e9rmica Um \u00e1tomo \u00e9 um espa\u00e7o vazio? Uma representa\u00e7\u00e3o figurativa do \u00e1tomo de h\u00e9lio-4 com a nuvem de el\u00e9trons em tons de cinza.\u00a0\u00c9 prov\u00e1vel que pr\u00f3tons e n\u00eautrons sejam encontrados … Ler mais<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[14],"tags":[],"yoast_head":"\nO que \u00e9 Atom - Um \u00e1tomo \u00e9 um espa\u00e7o vazio? - Defini\u00e7\u00e3o<\/title>\n<meta name=\"description\" content=\"Um \u00e1tomo \u00e9 um espa\u00e7o vazio? Pode parecer que o espa\u00e7o e, de fato, o assunto esteja vazio, mas n\u00e3o est\u00e1. 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