1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
melomori [17]
3 years ago
6

Can somebody plz answer a.b.c (just make it 1 sentence for each)

Chemistry
2 answers:
Maurinko [17]3 years ago
8 0

Answer:

One sentence that can be written for evidence is:

Fossils. Fossils document the existence of now-extinct past species that are related to present-day species.

Eddi Din [679]3 years ago
7 0

Answer:

I think this is your answer. if I am right so.

Please mark me as brainliest. thanks!!

You might be interested in
Which of the following statements are FALSE of models? (select all that applies)
ira [324]

Answer:

A B and C

Explanation:

Hopefully this helps

7 0
3 years ago
Which of the following are testable?<br> hypotheses<br> laws<br> theories
Tamiku [17]
Hypothesis and theory
5 1
3 years ago
Read 2 more answers
How many mmHg are there in 5atm
natali 33 [55]
There is 3800 mmHg in 5 atm
7 0
3 years ago
Put the elements in order from lowest (1) to highest (6) electronegativity.
bogdanovich [222]
(1) Francium - 0.7 Lowest
(2) Barium - 0.89
(3) Aluminium- 1.61
(4) Copper - 1.90
(5) Phosphorus - 2.19
(6) Flurorine - 3.98 Highest electronegativity in periodic lable
8 0
3 years ago
Relate the properties of atoms, their position in the periodic table, and their number of valence electrons to their chemical re
dalvyx [7]

Answer:

Explanation:

An atom is the smallest unit of an element that can take part in a chemical reaction. Atoms are made up of protons, neutrons and electrons. Atoms can exist as a monoatomic (such as in the case of Helium, Xenon and Neon) or as diatomic (such as in the case of oxygen and nitrogen). Atoms take part in a chemical reaction and there reactivity varies among themselves.

From the above, it can be deduced that atoms have protons, neutrons and electrons. The number of protons (which is positively charged) of an atom determines it's position on the periodic table because elements in the periodic table are arranged according to the number of protons (called atomic number). The electron(s) present in the outermost shell of each atom (called valence electrons) determines there chemical reactivity. What happens here is that, all atoms (except noble gases) want to achieve there duplet or octet configuration so as to become stable. This octet configuration means they want to have there outermost shell completely filled (with eight electrons or two electrons for duplet). They usually achieve this configuration by taking part in chemical reactions. Thus, when an atom has just one electron in it's outermost shell, it becomes easy to lose it to another atom by way of interacting with it in a chemical reaction. When it loses this single electron (valence electron) in it's outermost shell, it becomes stable with the inner completely filled shell (that would be the new outermost shell). Examples include Lithium, sodium and potassium. Sodium (with eleven electrons and three shells) would lose the single electron in it's outermost shell so as to have just two shells with the second shell completely filled with eight electrons. Thus, <u>the more the valence electron to be lost to achieve the octet structure</u>,<u> the lesser the reactivity of the atom</u>.

Also, an atom that has just one electron to complete it's own outermost shell and thus achieve it's octet structure is also highly reactive. This is also because it is easy for this atom to receive a single electron and become completely filled. Examples include chlorine, fluorine and iodine. Fluorine (with nine electrons and two shells) will easily accept one more electron so as to achieve it's octet structure with a completely filled outermost shell (of eight electrons). Thus, <u>the lesser the electrons to be gained to achieve the octet configuration, the higher the chemical reactivity of such atoms</u>. Noble gases have extremely low or no reactivity at all for this reason because it has a completely filled outermost shell (no losing or donating).

It should also be noted that metals (which are found on the left of the periodic table) exist as monoatomic while gases (which are found on the right), with the exception of noble gases, are mostly diatomic.

3 0
2 years ago
Other questions:
  • 2. Atoms are stable and not likely to react when.
    8·1 answer
  • A sample of gas at a fixed pressure has a temperature of 300 K and a volume of 3 L. Calculate the volume if the gas is heated to
    10·1 answer
  • The nucleus of an atom is
    11·2 answers
  • True or false. Gas particles never touch each other.
    9·1 answer
  • Which are homogeneous mixtures? check all that apply
    9·2 answers
  • Which can be classified as a trace fossil
    7·2 answers
  • PLZ HELP OR WILL FAIL!!
    15·1 answer
  • Can someone please answer my last question, ill post more like it for more points :)
    14·1 answer
  • Hurry 50 points<br> What resource is often compromised due to mining?
    11·1 answer
  • How many moles are in 2.00 g of NaCl?7
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!