adnalamanju05

What is NFT? 

5. ______ is the basic unit of all elements of a matter.
6. An atom that contains fewer electrons than protons is said to be _______ charge.
7. A particle that contains more electrons than protons is ______ charge.
8. If an atom contains equal numbers of electrons and protons, the atoms are described as _______.

a. atom b. electrically neutral

c. electron d. negatively

e. neutron f. nucleus

g. positively h. proton

which of the following statements accurately describes nuclear fusion reactors?

a) Fusion reactions require very high temperature

b) Nuclear fusion occurs in Earth's crust.

c) Fusion reactions can fuse three isotopes of hydrogen into one helium.

d) Fusion would be a more advanced technology if governments had provided some money for research or if attempts to develop it were more than just a few years old.

1. Which of the following elements would have similar properties to Sulfur?

a. Chlorine b. Argon c. Aluminum d. Oxygen

2. Which element is likely to react violently with water (Hint: think back to the demo you saw!)?

a. Beryllium b. Carbon c. Caesium d. Sulfur

3. Which element is most likely to be a clear, colourless, odourless gas that is unreactive?

a. Fluorine b. Krypton c. Nitrogen d. Hydrogen

4. Which statement is correct?

a. Be is more reactive than Li c. O is more reactive than F

b. Kr is more reactive than Br d. Ra is more reactive than Be

5. Which of the following are true about the Alkaline Earth metals?

a. They all have 2 electrons in their valence shell

b. They are the most reactive group of metals

c. They burn with bright colourful flames, and are used in fireworks

d. All of the above are true

e. Only a. and c. are true

6. Rutherford’s gold foil experiment showed that…

a. electrons do not surround the nucleus in a random cloud, but rather in organized orbitals

b. atoms have a tiny, positively charged nucleus

c. electrons crowd tightly together at an atom’s centre

d. atoms contain neutrons

7. Which determines the identity of an atom?

a. the sum of protons and neutrons c. number of neutrons

b. number of protons in the nucleus d. its driver’s license

8. If an atom has six protons, six electrons, and eight neutrons it must be an isotope of…

a. carbon b. silicon c. oxygen d. magnesium

9. An atom has a mass number of 20 and it contains 10 neutrons. What element must it be?

a. calcium b. neon c. zinc d. More information is needed.

10. Which of the following statements is correct?

a. Protons and electrons are located in the nucleus of an atom.

b. All atoms of the element lithium will have 4 neutrons.

c. The energy level closest to the nucleus is the valence shell.

d. Two atoms of the same element can have different numbers of neutrons.

11. Which phrase best describes a group or family in the periodic table?

a. Elements that have the same melting point.

b. Elements that have the same number of electrons in their outermost orbits.

c. Elements in the same group all have the same number of orbitals/energy levels.

d. Elements that are in the same row.

Blue vitriol is

(A) Sodium sulphate

(B) Iron sulphate

(C) Calcium sulphate

(D) Copper sulphate

What is the formulae of washing soda ?

What is chemical change.

 How many receptacles can be on a branch circuit for a refrigerator? 

What is the difference between AC (alternating current) and DC (direct current) in terms of their flow of electric charge?

What is light?

Centre of gravity of earth? Explain

What made Gravity?

WHAT IS SOLVENT?

Fill in the blank:

In a                   ___ environment, both animal and plant cells ___                             ___ as the water

moves                     the cell through the process of                       , Animal cells would die. In plant

cells this process is called plasmolysis, or the plant cells are                            ___ (shrink) - this is when

the plasma membrane pulls away from the cell wall, as excess water goes out of the cell. The cell wall protects

the plan cell from dying right away and they can go back to normal when the concentration of solutes is lowered on 

the                         ___ of the cell. When this happens, the water will move from a ___    solution 

towards a ___                             solution through the process of ___                ___.

How does a strong password help in maintaining cybersecurity?

What are the parameters to define a strong password?

Pythagoras theorem simple method

What's the difference between electricity and the electronics?

What's science?

Physical science.

what is the difference between discovery science and hypothesis-driven science?

Who is father of science?

What is science

Why is evaporated water so clean?

Why is water wet?

why is recycling important?

Mold important in food microbiology 

21. Which is the largest land animal?

What is the world's largest plant?

Which is.largest bone in our body 👅👅

41. Which is the largest animal on earth?

1. What is the tallest mountain on Earth?

1. What is the hottest desert on Earth?

1. What is the coldest place on Earth?

4. Why does the moon change shape?

1. Why is the sky blue?

2. Why does the sun rise in the east and set in the west?

what is a structure?

What is meant solar system?