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What do you notice with the number of valence electrons?
The number of valence electrons determine the chemical properties of a particular element. For example, elements in group 1 tend to donate its valence electron away to produce its stable +1 ion. It also explains the formation of -1 ions from group 17 elements (halogens).
Which best explains how Dmitri Mendeleev organized elements in his periodic table?
Dmitri Mendeleev organized elements in his periodic table primarily by increasing atomic mass and grouped them according to similar chemical properties. He noticed that elements with similar characteristics appeared at regular intervals, which led him to create a periodic pattern. Mendeleev also left gaps for undiscovered elements, predicting their properties based on the trends he observed. This innovative approach laid the foundation for the modern periodic table.
What are the advantages of modern periodic law?
1. The classification of elements is based on the atomic number, which is a more fundamental property. 2. The reason for placing isotopes at one place is justified as the classification is on the basis of atomic number. 3. It explains the periodicity of the properties of the elements and relates them to their electronic configurations. 5. The position of the elements that were misfits on the basis of mass number (anomalous pairs like argon and potassium) could be justified on the basis of atomic number. 6. The lanthanides and actinides are placed separately at the bottom of the periodic table. 7. The table is simple, systematic and easy way for remembering the properties of various elements as it is based on the electronic configuration.
Which answer best explains how the modern periodic table was derived?
The modern periodic table was derived based on the periodic law, which states that the properties of elements are a periodic function of their atomic number. Dmitri Mendeleev and Lothar Meyer independently developed versions of the periodic table by arranging elements in order of increasing atomic number and grouping elements with similar properties together. Mendeleev's table also left gaps for undiscovered elements, allowing for the prediction of properties of these elements.
Is it true that a atomic theory states that atoms of two or more elements can join together to form other elements?
Yes, that is true. Atoms of different elements can combine to form compounds through chemical reactions. This is the basis of modern atomic theory, which explains how elements interact and combine to form new substances.
What unites and explains a range of observation?
A theory unites and explains a range of observations.
Why did Mendeleev set up the periodic table the way he did?
Because he was creating a book called the Principle of Chemistry and he noticed the pattern in every elment. So he made a table or (chart) called Periodic Table of Elements.
What do you notice with the number of valence electrons?
The number of valence electrons determine the chemical properties of a particular element. For example, elements in group 1 tend to donate its valence electron away to produce its stable +1 ion. It also explains the formation of -1 ions from group 17 elements (halogens).
Which best explains how Dmitri Mendeleev organized elements in his periodic table?
Dmitri Mendeleev organized elements in his periodic table primarily by increasing atomic mass and grouped them according to similar chemical properties. He noticed that elements with similar characteristics appeared at regular intervals, which led him to create a periodic pattern. Mendeleev also left gaps for undiscovered elements, predicting their properties based on the trends he observed. This innovative approach laid the foundation for the modern periodic table.
What was the problem with Dobereiner's periodic table?
Dobereiner's periodic table, proposed in the early 19th century, attempted to group elements into triads based on their similar chemical properties. However, this classification system was limited as it only included a few elements and did not account for all known elements at the time. Additionally, the triads were based on average atomic masses, which were not always accurate due to the existence of isotopes. This led to inconsistencies and inaccuracies in the arrangement of elements.
Why is the periodical table used?
So you can classify the elements into groups.
Why would something be a law and not an observation?
A law explains what is observed.
Atomic theory explains what?
Atomic theory explains that matter is composed of small particles called atoms, which are indivisible and retain their identity in chemical reactions. It also explains how atoms combine to form molecules through bonds and how these interactions determine the properties of matter.
Does the periodic table explain the shell model or does the shell model explain the periodic table?
The shell model explains the organization of the periodic table. The elements in the first period have electrons in the first shell; the elements in the second period have electrons in the first two shells; the elements in the third period have electrons in the first three shells; and so on.
The big bang hypothesis explains?
Hubble's red shift observation.
What explains the properties explains metals?
The electrons they contain, which have the ability to move freely
What is the name of the theory that explains brown's observation?
The name of the theory that explains Brown's observation is the kinetic molecular theory of matter. This theory states that all matter is composed of particles (atoms or molecules) that are in constant motion, and explains the behavior of gases, including diffusion, pressure, and temperature.
