Question

1. Viruses can be seen only with
microscope.
2. Electric configuration of sodium is
3. The electron shell
is nearest to the nucleus.
4. The instrument which records the earthquakes is called
5.
make the environment poisonous and unhealthy.​

Answer 1

Answer:

1. false, they can not be seen in compound microscope

2. 2, 8, 1

3. k

4. ---

5.

Answer 2

Answer:

1. Viruses are so small they can only be seen under an electron microscope (EM) as quite undefined grainy images.

2. Symbol:- [Ne] 3s¹

Explanation:-

We'll put six in the 2p orbital and then put the remaining electron in the 3s. Therefore the sodium electron configuration will be 1s22s22p63s1. The configuration notation provides an easy way for scientists to write and communicate how electrons are arranged around the nucleus of an atom.

4. seismograph. A seismograph, or seismometer, is an instrument used to detect and record earthquakes. Generally, it consists of a mass attached to a fixed base.

5. Pollution make the environment poisonous and unhealthy.

Follow me