2. Words to the text

electron [ i´letrɔn] – електрон

noble gases [´noubl gəeses] – благородні гази

disinfectant [´disin´fektənt] – дезінфікуючий

compound [´kɔpaund] - суміш

shortage [ʃ ɔ:tidz] -дефіцит

charcoal[´tʃa:koul] - вугілля

inactive [in´əektiv] - неактивний

level [´level] - рівень

outstanding [´ autstəendiɳ] – виявляючий

3.Give synonyms to the following words

Iodine (йод) – iodized galt (йодованна сіль)

Combine(поєднує) – react(реагує)

Free(вільний) – uncombined(незв'язаний)

Inert(інертні) – inactive(неактивні)

4. Give antonyms to the following words

Metals-nonmetals

Physical properties – chemical properties

5. Match words with their definitions

1	B
2	E
3	A
4	C
5	D
1. Element			A. a property that can be observed without changing the identity of a substance.
2. Compound			B. a substance that cannot be broken down into other substances.
3.Chemical property			C. a negatively charged atomic particle.
4. Electron			D. a property that can be observed only by changing the identity of a substance.
5. Physical property			E. a substance made up of two or more elements that have been chemically combined.

6. Answer following questions.

1) Have nonmetals properties that make them very different from metals?

Nonmetals have properties that make them very different from metals.

2) Are oxygen and hydrogen both colorless gases?

Oxygen and hydrogen are both colorless gases.

3) How many electrons have metals in the outermost energy levels?

Metals have three or fewer electrons in the outermost energy levels.

4) Have the halogens different physical or chemical properties?

The halogens have different physical properties.

7. Put the verbs into correct tense form

1)Nonmetals(to be) solids, gases, and include one liquid, bromine(Br).

Nonmetals are solids, gases, and include one liquid, bromine(Br). Solid nonmetals are brittle.

2)Metals(to have) three or fewer electrons in the outermost energy levels.

Metals have three or fewer electrons in the outermost energy levels.

3)A salt(to be) a compound in which a metal (to be) combined with one or more nonmetals.

A salt is a compound in which a metal is combined with one or more nonmetals.

4)The halogens (to have) different physical properties.

The halogens have different physical properties.

5)The halogens(to be) the most active of the nonmetals.

The halogens are the most active of the nonmetals.

6)None of them (to be) found in the free, or uncombined, state in nature.

None of them are found in the free, or uncombined, state in nature.

7) Each halogen ( to have) seven electrons in its outermost energy levels.

Each halogen has seven electrons in its outermost energy levels.

8)This "iodized salt" ( to help) to keep your thyroid gland working properly.

This "iodized salt" helps to keep your thyroid gland working properly.