原子の質量数は、その核を構成する中性子と陽子の数の合計です。
He is not available at the moment.
While welcoming the firming up of the present government policy to abandon the proposal of the reform bill to the Diet, at the same time some are worried that Prime Minister Koizumi won't clearly state the bill's withdrawal.
The mass number of an atom is the sum of the number of neutrons and protons that make up its nucleus.
アカウントを持っていませんか？ 新規登録
アカウントを持っていますか？ ログイン
DiQt（ディクト）
無料
★★★★★★★★★★
