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Lyrx [107]
3 years ago
6

Hydrogen bonds form between molecules containing _________ bonds; the hydrogen bond is between a hydrogen atom of one molecule a

nd a partially _________ charged atom of another.
A. polar covalent; negativelyB. polar covalent; positivelyC. nonpolar covalent; positivelyD. nonpolar covalent; negativelyE. ionic; positively
Chemistry
1 answer:
nasty-shy [4]3 years ago
5 0

Answer:

The answer is A. Polar covalent; negatively

Explanation:

Hydrogen bonds form between molecules containing polar covalent bond the hydrogen bond is been a hydrogen atom of one molecule and a partially negative charged atom of another.

Example H_{2}O (water):- It contain a slight positive charge on one side and a slight negative charge on the other.

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People who work with radioactive materials often wear a _________ to reveal how much radiation they have been exposed to. A. fil
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People who work with radioactive materials often wear a film badge to reveal how much radiation they have been exposed to. The film badge dosimeter or the film badge is a dosimeter worn by these people working with materials that are radioactive for the purpose of monitoring cumulative radiation dose due to ionizing radiation. The badge has two parts; the photographic film, and a holder.  
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3 years ago
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#1: How are the elements arranged in the modern periodic table?
Alekssandra [29.7K]

1- The correct answer is C :


the elements arranged in the modern periodic table by increasing atomic number.


The explanation:


-The elements in the periodic table are arranged to increase the atomic number. All of these elements display several other trends and we can use the periodic law and table formation to predict their chemical, physical, and atomic properties.


2- The correct answer is C:


strontium, magnesium, calcium, beryllium are the elements which have similar properties.


The explanation:

-strontium, magnesium, calcium, beryllium, these belong to the alkaline earth metal group.

Because the outer electron structure in all of these elements is similar, they all have somewhat similar chemical and physical properties .

3- The correct answer is A :


Potassium


The explanation:


-The elements potassium and sodium have similar chemical properties because they have the same number of valence electrons and form +1 ions.



4- The correct answer is D


The explanation:


Mendeleev didn't include helium, neon, and argon in his periodic table because these elements had not yet been discovered.


5- The correct answer is B:


The periodic law describes trends seen across periods within the periodic table.


The explanation:


When the chemical elements are arranged, there is a pattern called the “periodic law” in their properties, in which elements in the same column (group) have similar properties


4 0
3 years ago
Read 2 more answers
I need help in thiss
Papessa [141]
I know CL is chlorine and NA is sodium.
8 0
2 years ago
What is true about the number of water particles in the pot after the water has been warmed?
Elza [17]

Answer:ye

Explanation:

8 0
3 years ago
Why is iron described as an element
Harrizon [31]
Iron is a type of element because iron is metal and metal is also a mineral
Hoped this helped
5 0
3 years ago
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