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24. Tin cans can be hammered and deformed its shape. What properties does it show!

c. elasticity

d. conductivity

b. ductile

25. Which subatomic particles make up most of the mass of an atom?

a. neutron

b. proton

c. proton and neutron

d. proton and electron

26. Atom become alan

a, ion

b. isotope  if electron is gained or lost.

c. molecule

d alpha particle

27. According to John Dalton, this particle is indivisible and indestructible.

a, atom

b. molecule

c. matter

d. energy

28. Ca-14 is an example of

a. atom

b. molecule

c. alpha particle

d. isotope

29. At around 1869, this scientist came up with how the modem periodic table is now arranged

a. Johan Dobereiner

c. Lothar Mayer and Dmitri Mendeleev

b. John Newlands

d. John Dalton

30. Which of the following is the symbol of an element Tungsten?

a. T

b. Tu

c. Tt

d. W

31. Water Cycle cannot take place in the absence of what element?

a. human

b. sun

d. trees

c. moon

32. What is a gene?

a. DNA segment that codes for a certain protein or trait

b. a trait that is based on a protein

c. RNA that codes for protein

d. protein that leads to a trait​

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