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denis23 [38]
3 years ago
8

How many neutrons does an element have if its atomic number is 40 and its mass number is 154

Chemistry
1 answer:
kramer3 years ago
4 0
I am not sure about this answer 194
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Give the four symbols for physical states of reactants and products, and tell what each means.
pshichka [43]
We are going to use table salt, NaCl as an example.

(s) = solid, eg the salt you put on your food is a crystalline solid. 
(l)  = liquid, if you melt salt it take on a liquid form
(g)  = gaseous, if you put enough energy in the salt will turn into a gas.
(aq) = aqueous, meaning in water or another solvent. If you put some table salt in water and stir it, it will dissolve, the NaCl molecules dont get destroyed but they dissolve becoming part of the liquid. 
6 0
3 years ago
What is the name of the ionic compound made of beryllium and chlorine?
mojhsa [17]

Answer:

beryllium chloride

Explanation:

Therefore a compound made from beryllium and chlorine will be named beryllium chloride.

5 0
3 years ago
Hydrogen gas can combine with oxygen gas under certain conditions to form water.
stellarik [79]

Answer:

The correct answer is product.

Explanation:

Hydrogen gas reacts with oxygen gas to generate water molecule.

   2H2+O2 = 2H2O

We all know that that substances which are present at the left hand side of the equilibrium sign act as substrate and the substances those are present in the right hand side of the equilibrium sign are called products.

  From that point of view it can be stated that water or H2O is the product of the reaction between hydrogen and oxygen.

5 0
4 years ago
How would it have been if particles of matter had no space?
iragen [17]

Answer:

Matter is made of small particles of atoms or molecules. ... The particles in the solid are touching with very little space between them. The particles in a liquid usually are still touching but there are some spaces between them. The gas particles have big distances between them.

6 0
3 years ago
Which of the following statements is true of the corona
frez [133]

Answer:

C. It’s the outermost layer of the suns atmosphere

8 0
3 years ago
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