原子能牽幾隻手
畫面最原始的地方：手是化學鍵，數的是一個原子能接住幾個原子。
noun · C1
In chemistry, the number that shows how many other atoms one atom, group or radical can join with, counted from how many electrons it gives away, takes, or shares.
原子價
這個拼法底下其實是2個不同的字，意思沒有關係， 只是長得一樣。下面分開列出來。跳到 原子價 · 窗簾上緣布；床裙
1
valence
noun核心畫面
One way to hold this word is to picture a thing with a fixed number of hands, and to ask how many it can hold and which way it pulls. An oxygen atom has two hands, so it holds two hydrogens. A verb like give has three, so a sentence with give needs three people or things around it. A feeling has one hand too, but what matters there is the direction it pulls — toward the thing or away from it. Counting the hands, and reading the pull, is what valence does in every field that borrowed it.
valence 可以想成「這個東西有幾隻手，以及它往哪邊拉」這個畫面。氧原子有兩隻手，所以牽住兩個氫，變成水。動詞 …更多收起
valence 可以想成「這個東西有幾隻手，以及它往哪邊拉」這個畫面。氧原子有兩隻手，所以牽住兩個氫，變成水。動詞 give 也像有三隻手，所以句子裡得有給的人、東西、收的人。感受也有拉力，只是那裡重要的不是幾隻手，而是把人往裡拉還是往外推。不管借到哪個領域，這個字做的都是同一件事：數手、或讀那股拉力。From the word’s history
The source says the chemistry sense and the feeling sense were both borrowed from German Valenz plus English -ence, and that Valenz is short for Quantivalenz, which goes back to Latin quantus, how much. So the word began as a question of how much a thing can combine, which is the counting picture above.
來源資料說，化學的意思和心理學的意思都是從德文 Valenz 借來，再加上英文字尾 -ence；而 Valenz 是 Quantivalenz 的縮寫，可以追到拉丁文 quantus（多少）。所以這個字一開始問的就是「能結合多少」，跟上面那個數手的畫面正好對上。
packet wiktionary entry for valence, etymology 1 (kaikki:3f6f69a190036ae4:790031774:59080)
From the picture
Also in this word
noun · C1
In psychology, the positive or negative value a person puts on a thing, event or state — whether it pulls them toward it or pushes them away.
情緒效價
noun · C2
In linguistics, the number of noun phrases a verb takes around it, including its subject — usually none to three, and occasionally four.
動詞價
A second word, same spelling
2
valence
noun核心畫面
This one is best held as a separate word that happens to share a spelling. Picture a short strip of cloth running along the top of a curtain or around the base of a bed, there to cover the rail, the hooks or the gap underneath. Nothing here is being counted or combined, and the vowel is usually different too: VAL-ence, not VAY-lence.
這個 valence 最好當成另一個字來記，只是拼法剛好一樣。畫面可以想成一條短短的布，橫在窗簾最上面，或圍著床沿一…更多收起
這個 valence 最好當成另一個字來記，只是拼法剛好一樣。畫面可以想成一條短短的布，橫在窗簾最上面，或圍著床沿一圈，用來遮住軌道、掛勾或床底的空隙。這裡沒有什麼東西在被數、在結合。唸法通常也不同：VAL-ence，不是 VAY-lence。From the word’s history
The source lists this under a separate origin and describes it only as a variant of valance, so the picture does not need to connect to the chemistry word at all.
來源資料把它放在另一條詞源底下，只說它是 valance 的變體拼法。所以這個畫面不需要跟化學那個 valence 牽上關係。
packet wiktionary entry for valence, etymology 2 (kaikki:3f6f69a190036ae4:790090854:700): 'A variant of valance.'