1. Put the steps of the scientific method in 1. Observation Observat ine scienti

Question

1. Put the steps of the scientific method in 1. Observation Observat ine scientific method in the correct order: 2. Conclusion 3. data collection & analysis 4. Hypothesis 5. experimental design 6. Question ( a. 1-2-3-4-5-6 b. 1-5-3-6-4-2 c. 1-6-3-4-5-2 d. 1-6-4-5-3-2 e. 1-6-4-2-3-5 2· The smallest units of life are A) Organelles B) Atoms C) DNA D) Cells another element i unique properties of an element will definitely change into whose resembling its number of The A) protons B) neutrons C) electrons 4. Radioactive isotopes differ from 'normal' atoms because of a difference in the e) number of neutro a) number of electrons b) number of protons and electrons Electrons are present a) inside the nucleus of an atom b) outside the nucleus of an atom c) both inside and outside the nucleus of an atom Hydrogen bonds in water are formed a) between oxygen and hydrogen within a water molecule b) between oxygen and hydrogen of neighboring water molecules c) between hydrogen and hydrogen of neighboring water molecules Chemical bonds are essentially formed because of interactions of b) neutrons c) electrons a) protons

Explanation / Answer

1.

Scientific method begins with an observation. Then, the observation is challenged with questions.

A hypothesis is put forward. To check the hypothesis, an experiment is designed.

Data is collected from the experiment and analyzed. This gives conclusions.

So, option D is correct.

2.

Cells are smallest structural and functional units of life.

Option D is correct.

3.

Elements with same number of electrons in their valence shells show similar chemical properties.

Elements belonging to a same group contain same number of valence electrons. So, they exhibit similar chemical properties.

So, option C is correct.

4.

Radioactive elements contain different isotopes which differ in the number of neutrons.

So, option C is correct.

5.

According to the modern atomic theory, electrons are present as a cloud around the nucleus.

So, option B is correct.

6.

H-bond is formed between H atom and another high electronegative atom (F, O, N and S).

In water, H-bond is formed between H and O atoms.

So, option B is correct.

7.

Chemical bonds are formed between two atoms by donation/acceptation or sharing of electrons.

Neutrons or protons are not involved in chemical bond formation.

So, option C is correct.

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