b)conductivity
c)hardness
d)odor
Alai is hitting each with a hammer, the physical property which he must be compared the two materials must be hardness.
A physical property is a characteristic of matter that is not associated with a change in its chemical composition. Familiar examples of physical properties include density, colour, hardness, melting and boiling points, and electrical conductivity.
Alai is hitting each with a hammer, the physical property which he must be compared to the two materials must be hardness.
Solubility can be tested when you put them in a solvent.
Odour can be tested with a smell.
Conductivity can be tested with electricity. Hardness can be tested with its resistance to the force that hits it.
Hence, Alai is comparing hardness.
Learn more about a physical property here:
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Answer:
An SN2 (substitution nucleophilic bimolecular) reaction
Explanation:
This is a type of organic reaction that involves a nucleophile attacking an electrophilic center, resulting in the displacement of a leaving group from that center. This type of reaction typically occurs at a saturated carbon atom, where the nucleophile displaces a leaving group attached to that carbon atom. The reaction is bimolecular because it involves the collision of two molecules, the nucleophile and the substrate.
2. Mass Number
3. total number of neutrons in an atom of the element
4. total number of valence electrons in an atom of the element
Answer is (1) - atomic number.
Atomic number is unique for an element. The elements in periodic table are organized according to the atomic number of elements. Another thing is atomic number is equal to number of protons of the element.
Mass number can be defined as the sum of proton number and neutron number. Although proton number is same for the atoms of same element, the neutron number can be varied.The atoms which has same atomic number but have different number of neutrons are called isotopes. Hence, mass number not enough for the identification of elements.
Only the neutron number is also not enough for the identification of elements. But if you have both mass number and the neutron number, then you can find atomic number by using mass number = proton number + neutron number equation. Then you can identify the element.
If you have total number of electrons of the element when it is in its neutral state you can identify the element because at neutral state number of electrons = number of protons (atomic number). But if only the valence electrons are given then you cannot find the element exactly because usually all elements in certain group have same number of valence electrons.
b. fulcrum
c. mechanical advantage
d. resistance force
Answer:
Mechanical Advantage
Explanation: