| query | The c____________ of a substance is the proportion of essential ingredients or substances in it.The concentration of a substance is the proportion of essential ingredients or substances in it. pH is a measure of the concentration of free hydrogen atoms in a solution. Global ozone concentrations have dropped over the last decade. |
|---|---|
| word | concentration |
| full-definition | noun Concentration on something involves giving all your attention to it. Neal kept interrupting, breaking my concentration. We lacked concentration and it cost us the goal and the game. A concentration of something is a large amount of it or large numbers of it in a small area. The area has one of the world's greatest concentrations of wildlife. There's been too much concentration of power in the hands of central authorities. The concentration of a substance is the proportion of essential ingredients or substances in it. pH is a measure of the concentration of free hydrogen atoms in a solution. Global ozone concentrations have dropped over the last decade. |
| inflections | concentrations |
| cefr-level | B2 |
Tags: oxford5k::cefr-level:b2
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