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adell [148]
3 years ago
10

Lead is melted and is poured into a mold to make fishing weights. This is an example of a________change.

Biology
1 answer:
Anna71 [15]3 years ago
6 0
Physical change because it does not combine with any other substance it just changes the state of matter
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A bond of the following elements would be of what type? Na + Cl <br><br> Covalent or ionic
nikklg [1K]

Answer:

ionic

Explanation:

Ionic bond:

It is the bond which is formed by the transfer of electron from one atom to the atom of another element.  

Both bonded atoms have very large electronegativity difference. The atom with large electronegativity value accept the electron from other with smaller value of electronegativity.

For example:

Sodium chloride is ionic compound. The electronegativity of chlorine is 3.16 and for sodium is 0.93. There is large difference is present. That's why electron from sodium is transfer to the chlorine. Sodium becomes positive and chlorine becomes negative ion.

There are one valance electron in sodium so it needed to lose one valance electrons to complete the octet while chlorine needed one electron to complete the octet. Thus electrons lost by sodium atom is gained by atom of chlorine and form ionic compound.

2Na + Cl₂ → 2NaCl

6 0
3 years ago
Based on electron configuration, which of these elements would exhibit chemical behavior most like that of oxygen?
adelina 88 [10]

Answer:

D. Sulfur

Explanation:

Electrons are filled in shells. Oxygen has a total of 8 electrons while sulfur has a total of 16 electrons. Out of the total eight electrons, the first shell has two electrons while six electrons are filled in the “s and p” orbits of the second shell giving the outer shell a configuration of "2s2, 2p4".

Likewise, out of the total 16 electrons of sulfur, the last 6 electrons are filled in "s" and "p" orbits of the third shell. Sulfur has a total of six electrons in its outer most shell "3s² 3p⁴". Since the electrons present in the outer most shell are available for chemical reactions and determine the chemical nature of the atom, oxygen and sulfur should exhibit the same chemical properties.

3 0
3 years ago
1) compare all three states of matter to the
OLga [1]

Answer:

A

Explanation:

it has more matter in given area, so it is denser.

3 0
3 years ago
The foliated metamorphic rock that forms when the sedimentary rock shale is subjected to relatively low temperatures and pressur
ASHA 777 [7]
The answer is slate .
5 0
3 years ago
What characteristic is common to both in unicellular and multicellular algae?
Goshia [24]
There Both protist. Is what we can infer from the lack of information given.
3 0
3 years ago
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