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aleksandrvk [35]
3 years ago
13

Question 7 (Essay Worth 5 points)

Chemistry
2 answers:
Leya [2.2K]3 years ago
6 0

Answer:

other person said it!!

Explanation:

Lubov Fominskaja [6]3 years ago
5 0

The periodic table of elements is divided into columns and rows. The vertical columns represent the groups while the horizontal rows represent the periods. A group of elements usually have similar physical and chemical properties. The first column of the periodic table is made up of 7 elements including SODIUM.

1. The name of the element chosen is sodium and its chemical symbol is Na.

2. Sodium is a metal and thus it has metallic properties.

3. Sodium belongs to group one elements whose family name is ALKALI METALS.

4. The neutral atom of sodium is made up of 11 protons, 11 electrons and 12 neutrons.

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Physical properties
hichkok12 [17]

Answer:

melting point,boiling point ,density,refractive index.

Explanation:

5 0
3 years ago
Moose Population Trends in Bullwinkle National Park Year Population 1970 788 1975 654 1980 578 1985 609 1990 275 1995 350 2000 5
Natasha2012 [34]
C because the animals was in danger
3 0
3 years ago
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Which of the following trends is indirectly proportional to effective nuclear charge, Zeff
Julli [10]

Answer : Option C) Atomic Size

Explanation : The atomic radius of the elements is found to be decreasing if we go from left to right in the modern periodic table. Accordingly, Z_{eff} increases as the number of shielding electrons present in the atomic nucleus of the periodic elements which lies in the same row remains constant while the number of protons in each atomic shell increases.

The effective nuclear charge Z_{eff} of an atom is defined as the net positive charge which is felt by the valence electron of the atomic element.

When Z_{eff} is observed to decrease, it is seen that the atomic radius grows in size. So, it explains the inverse relationship between both. This phenomenon occurs, because there is more screening of the electrons from the nucleus taking place, which is observed due to decrease the attraction between the electron and the nucleus.

7 0
3 years ago
Read 2 more answers
How does the amount of water in a glass affect the pitch of the sound it produces?
Mrac [35]

Answer:

The glasses with different amounts of water make different sounds. ... This is because the empty glass only has air around it, so the glass vibrates quickly when it is hit, causing the high pitch sound. The glass full of water causes the glass to vibrate slower, and the sound you hear is at a lower pitch.

Explanation:

7 0
3 years ago
Read 2 more answers
Complete the following calculations regarding acid/base titrations
madam [21]

Based on the information provided and the assumption that the mole ratio of the acid to the base is 1:1, the molarity of the acid would be 0.0425 M

<h3>Acid/base Titration</h3>

Using the equation:

CaVa = CbVb

This is based on the assumption that the stoichiometric mole ratio of the acid to the base is 1:1.

Ca = CbVb/Va

                   0.1 x 25.5/60 = 0.0425 M

More on acid/base titration can be found here: brainly.com/question/2728613

6 0
3 years ago
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