Question

1. Define - Astronomical unit,
2. What is one light year?
3. Calculate the atomicity of 1,50
4. Classify the following as metals, Non-metals
and metalloids.
Sodium, Bismuth, Silver, Nitrogen, Silicon,
Carbon, Chlorine, Iron, Copper
5. What are compounds? Give two examples.​

Answer 1

Explanation:

1. an astronomical unit is the distance between sun and earth

2. light year is the distance travelled by light in a human year

3.

4.metals-sodium, silver, iron, copper,bismuth

non-metals-nitrogen,silicon,carbon,chlorine,

5. compoundes are mixtures of 2 or more elements

ex-CO2,H2o etc.

Answer 2

1.a unit of measurement equal to 149.6 million kilometres, the mean distance from the centre of the earth to the centre of the sun

2.. A light-year is the distance light travels in one Earth year.

3. don't know this answer

4. Sodium, iron, copper, silver are metals

5.A compound is a material composed of two or more components. Water, carbon dioxide, and table salt are some examples of compounds

hope its helps you.