ATOMS AND MOLECULES
Content: Ramakrishna Surampudi |
Coding Courtesy: Sai Anjani Kumar
1. Our ancestors thought that all matter is made up of _____.
PANCHA BHOOTHAS
molecules
ions
atoms
electrons
2. The study of the composition of matter and its properties is called _____.
geography
chemistry
physics
botany
zoology
3. Matter is made up of very small particles called _____.
radicals
nuclei
atoms
molecules
ions
4. When atoms combine, they form _____.
radicals
electrons
protons
molecules
ions
5. Attraction and repulsion is caused by _____.
atoms
molecules
matter
space
charge
6. Atoms and molecules are _____.
neutral
positively charged
negatively charged
sometimes positively charged and sometimes negatively charged
sometimes charged and sometimes neutral
7. When an atom get charged, it is called _____.
an electron
a proton
an ion
a molecule
a nucleus
8. When a molecule gets charged, it is called _____.
a proton
a radical
an atom
a molecule
an electron
9. What is at the centre of an atom?
ions
radicals
molecules
nucleus
electrons
10. What does the nucleus of an atom contain?
Electrons
Ions
Radicals
Molecules
Protons and neutrons
11. Where are the electrons in an atom located?
Outside the nuclesu
Inside the nucleus
Outside the atom
On the periphey of the atom
On the periphey of the nucleus
12. Protons are _____.
neutral
sometimes positively charged and sometimes negatively charged
sometimes charged and sometimes neutral
positively charged
negatively charged
13. Neutrons are _____.
sometimes charged and sometimes neutral
neutral
positively charged
negatively charged
sometimes positively charged and sometimes negatively charged
14. Electrons are _____.
sometimes positively charged and sometimes negatively charged
sometimes charged and sometimes neutral
negatively charged
neutral
positively charged
15. The model of the atom is similar to the model of the _____.
car engine
helicopter engine
earth's shape
movement of a train
solar system
16. A hydrogen atom has _____ protons, _____ neutrons and _____ electrons.
1, 0, 1
1, 1, 1
1, 1, 0
0, 1, 1
0, 0, 0
17. An oxygen atom has _____ protons, _____ neutrons and _____ electrons.
8, 8, 0
8, 0, 8
0, 8, 8
8, 7, 8
8, 8, 8
18. A proton is nearly _____ times bigger than an electron.
2
1900
1000
500
10
19. A neutron is _____.
smaller in size than an electron
bigger than the nucleus
bigger than the atom
bigger in size than a proton
smaller in size than a proton
20. A neutron is formed by the combination of _____.
1900 protons and 1900 electrons
2 protons and 2 neutrons
a proton and an electron
1900 protons
1900 electrons
21. A calcium atom has _____ protons, _____ neutrons and _____ electrons.
1, 1, 1
20, 20, 20
26, 26, 26
30, 30, 30
8, 8, 8
22. A zinc atom has _____ protons, _____ neutrons and _____ electrons.
8, 8, 8
1, 1, 1
30, 30, 30
26, 26, 26
20, 20, 20
23. An iron atom has _____ protons, _____ neutrons and _____ electrons.
20, 20, 20
8, 8, 8
1, 1, 1
26, 26, 26
30, 30, 30
24. A copper atom has _____ protons, _____ neutrons and _____ electrons.
30, 30, 30
20, 20, 20
8, 8, 8
1, 1, 1
29, 29, 29
25. A carbon atom has _____ protons, _____ neutrons and _____ electrons.
6, 6, 6
30, 30, 30
20, 20, 20
8, 8, 8
1, 1, 1