If an atom were about as big as a baseball stadium, the nucleus would be the size of a pea in the very center and the electrons would be somewhere on the outside edge.What makes an atom of gold different from an atom of iron is the number of protons, neutrons, and electrons inside...
(ii) The first excitation energy of the hydrogen atom is 10.2 eV.Explain what is meant by this statement. 相关知识点: 试题来源: 解析 The energy required by the hydrogen atom for it to transit from the ground state to its first excited state is 10.2eV. ...
Why an atom is a non living thing? Explain why homeostasis is necessary for the survival of an organism. What role does the skeletal system have in maintaining homeostasis? Explain why positive feedback cannot contribute to homeostasis.
What are the postulates of Bohr's model of an atom? 03:04 Summarise the rules for writing of distribution of electrons in variou... 05:00 Define valency by taking examples of silicon and oxygen. 02:11 Explain with examples (i) Atomic number, (ii) Mass number, (iii) Isoto... 03:...
The new owners have tried to give the restaurant a morefamily-friendly气氛)8.(氧)is a kind of gas that is necessary for animalsand plants to live.9.What(迷惑)me was why they didn't take hisadvice.10. It is impossible to prove the(存在)of God. ...
aI have loved you since I met you ...but I would not allow myself to truly feel it until today. I am always thinking ahead, making decisions out of fear. Today, because of you, what I learned from you ...every choice I made was different and my life has completely changed. And ...
aTom writes with his left hand 汤姆写与他的左手[translate] awhat type of jutsu is the Sharingan? Sharingan是什么样的jutsu ?[translate] ain addition, airports are required to have police officers nearby in case a possible hijacker or terrorist is discovered or other problems arise 另外,附近要求...
aTom 很不礼貌。他总是嘲笑别人。 Tom very not politeness.He always ridicules others.[translate] a谁负责这个部分 Who is responsible for this part[translate] athere you can meet Vanessa, Weixiong (LL PM), Mike, NOC, and our data centre 正在翻译,请等待... ...
in a Pb atom the screening effect of the 5d electrons is so poor that the effective nuclear charge on those 6s electrons is appreciably high. Therefore the 6s electrons are more difficult to be excited to the 6p orbitals. Taking the oxide of lead as an example: PbO2 is very ...
What does the melting temperature of an alloy indicates? Calculate the radius of the largest atom that can fit interstitially inyo fcc aluminum. Explain why the brake mean effective pressure of a naturally aspirated diesel engine i...