为我班准备参加本校Chinese New Year celebration,请家长教给您的孩子唱 《我的祖国 》。
我今天发给了每一位学生《我的祖国 》简谱, 五线谱 和歌词。
请观看第一届中国交响乐之春闭幕音乐会《我的祖国》4分钟44秒开始:
https://www.youtube.com/watch?v=ED-aEXNZQA4
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为我班准备参加本校Chinese New Year celebration,请家长教给您的孩子唱 《我的祖国 》。
我今天发给了每一位学生《我的祖国 》简谱, 五线谱 和歌词。
请观看第一届中国交响乐之春闭幕音乐会《我的祖国》4分钟44秒开始:
https://www.youtube.com/watch?v=ED-aEXNZQA4
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Posted in 九年级甲班《暨大中文》
Making paper models of Molecular Geometry: Tetrahedron, Trigonal pyramid and Octahedron
You may cut paper triangles and tape them together with Scotch tape.
Tetrahedron
NH3 – Trigonal pyramid molecular geometry
Octahedron
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Following the order below to fill the orbitals of the first 36 elements in the Period Table:
1s, 2s, 2p, 3s, 3p, 4s, 3d, 4p, 5s, 4d, 5p, …
A maximum of two electrons are put into orbitals in the order of increasing orbital energy: the lowest-energy orbitals are filled before electrons are placed in higher-energy orbitals.
Exp. 11Na: 1s2, 2s2, 2p6, 3s1 or [Ne] 3s1
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