sodium

sodium — noun

1. Sodium is a basic chemical substance — element number 11 on the periodic table.

1.名詞B1
釋義

Sodium is a basic chemical substance — element number 11 on the periodic table. It is a soft metal with a silvery-white colour that never occurs alone in nature; it always bonds with other elements, most often with chlorine to make table salt. The human body needs sodium to send nerve signals and for muscles to work properly.

例句

The doctor told Quan to reduce his sodium intake after his blood pressure went up.

sodium intake — medical/dietary collocation

A small piece of sodium metal reacts violently as soon as it touches water.

sodium metal reacts with water — safety warning in chemistry

文法句型

sodium + noun (sodium intake, sodium content, sodium levels)

low-/high- + sodium (low-sodium diet, high-sodium food)

用法筆記

Sodium is an uncountable noun — it never takes a plural form. In food and health writing it most often appears as a modifier: 'sodium intake', 'sodium content', 'low-sodium diet', 'high-sodium foods'. Note that 'salt' (sodium chloride) is a compound that contains sodium, but the two terms are not interchangeable in chemistry contexts.

常見錯誤

❌This soup contains too many sodium.
✅This soup contains too much sodium.
💡Sodium is an uncountable noun; use 'much' instead of 'many'.
❌Sodium and salt are the same thing.
✅Sodium is a chemical element, while table salt is a compound made of sodium and chlorine.
💡Learners often confuse the element with the compound (sodium chloride).