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
12345 [234]
3 years ago
8

When Dimitri Mendelev first developed the periodic table, one of the most important features that he introduced was starting a n

ew row at a certain point. What factor was most important to Mendelev in knowing when to end a row (period) and start a new one? A) The reactivity of the elements changed drastically. B) The state of the elements went from solid to liquid. C) The boiling point of the elements decreased dramatically. D) The size of the elements jumped from very large to very small.
Chemistry
2 answers:
sashaice [31]3 years ago
6 0

Answer:

A

Explanation:

Phantasy [73]3 years ago
3 0

At the end of a period we get an inert gas which is  very unreactive compared with the previous element ( a halogen).

The answer is A.

You might be interested in
Determine the mole fraction of the solute if you have 3.4 grams KCl in 8.1 grams H2O
Yakvenalex [24]
.42; 3.4 divided by 8.1 is about .42
6 0
3 years ago
Read 2 more answers
Show the difference between a saturated hydrocarbon and an unsaturated hydrocarbon.
harkovskaia [24]
Saturated hydrocarbons consists of C-C single bond whereas Unsaturated hydrocarbons consists C-C double/triple bond.
4 0
3 years ago
When a variable is determined by a factor outside of the function or model being​ evaluated, it is said to be A. statistically i
inna [77]

Answer:

The correct answer is B. exogenous

Explanation:

Let us try to describe exogenous and endogenous variables an exogenous variable value is influenced only by factors outside a model or system and is forced onto the model, while a change in an exogenous variable is known as an exogenous change. Also an endogenous variable is one whose value is influenced only by the system or model under study.

4 0
3 years ago
Consider the following ionization reaction.
77julia77 [94]

Answer:

See explanation

Explanation:

According to Bronsted-Lowry, an acid is a proton donor while a base is a proton acceptor.

Hence, if we consider the reaction above, we will notice that for each base there is a conjugate acid and for each acid there is a conjugate base.

For the acid HNO3, its conjugate base is NO3^- while for the acid H3O^+, its conjugate base is H2O.

4 0
3 years ago
When a new bond forms in a chemical reaction, what happens?
Kisachek [45]
The answer to this question would be A. Energy is released. 

When a chemical bond is a form, the bond will either suck up energy or produce energy. So, to be precise the energy is not always released but also can be absorbed. In this case, the energy released number will be a minus.

Options B and C is definitely wrong since the bond is formed by an electron, it won't affects neutron/proton.
Option D might be true since the product is made of 2 or more atoms then it would seem larger. But the size of the actual atom won't be increased.

8 0
3 years ago
Read 2 more answers
Other questions:
  • Balance the following chemical equation.​​​​​​​(2)
    12·1 answer
  • WHAT IS THE CIENTIFIC RESULT WHEN YOU MAKE MARSHMELLOWS!?!?!??!?!??!!? pls its for 2morrow! :(
    8·1 answer
  • The shorthand notation for fluorine- 19 is...?
    14·1 answer
  • Which substance has a molar mass of 33.99 g/mol?
    14·1 answer
  • What is Keystone XL pipeline?
    7·1 answer
  • Which substances are componds
    10·1 answer
  • Find electron proton and neutron for 17cl​
    12·1 answer
  • Please answer this!!!!!!
    5·2 answers
  • 4Fe + 302 → 2Fe2O3
    14·1 answer
  • 54:63 ratio simplest form?
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!