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What are the rules for reactivity of metals on the periodic table?
The reactivity increases with increasing numbers of electron shells (energy levels).
What chemical equation has equal numbers of reactant and product atoms?
Any chemical reaction.
How is valence and reactivity related?
Valence electrons are the electrons on the outer shell of an atom. Valence electrons help to determine the reactivity of a substance because atoms do their best to "fill" their outer shell with 8 electrons, thus achieving a more stable energetic state. Different atoms have different numbers of valence electrons, which affects their reactivity. For instance, noble gases are inert because they possess a full set of valence electrons and don't need to "borrow" or "give away" electrons to have a full outer shell. Halogens, on the other hand, are 1 electron away from filling their outer shell, and are very reactive as a result (they attempt to "borrow" an electron with other atoms by forming a chemical bond).
What basic information is contained in the Periodic table of elements?
The periodic table include only chemical elements each has a unique atomic number that represents the number of protons in its nucleus. Most elements have differing numbers of neutrons among different atoms these are referred to as isotopes.
What is a combination of symbols and numbers that describes a molecule?
A combination of symbols and numbers that describes a molecule is called a chemical formula. It represents the types of atoms present in the molecule and their respective ratios. The symbols represent the chemical elements (e.g., H for hydrogen, O for oxygen) and the numbers indicate the number of atoms of each element in the molecule. Chemical formulas are essential for understanding the composition and structure of molecules in chemistry.
Which property of alkaline earth metal increases with increase in their atomic numbers?
reactivity
What happens to the reactivity of elements in groups as the atomic numbers increase across a period?
they become more reactive since you are moving from left to right on the Periodic Table, the elements in group 17 are the most reactive.
What role do oxidation numbers play in a chemical formulas?
Oxidation numbers are very important in much of chemistry because many times atoms do lose or gain electrons. When this happens, they become ions.However, oxidation numbers are especially important when writing chemical formulas for ionic compounds.
What happens to reactivity of elements in groups labeled a as atomic numbers increase across a period?
they become more reactive since you are moving from left to right on the Periodic Table, the elements in group 17 are the most reactive.
What happens to the reactivity of elements in a group labeled A as atomic numbers increase across period?
In a group labeled as A, as atomic numbers increase across a period, the reactivity of elements generally decreases. This is because as you move from left to right across a period, the elements have more protons in the nucleus, which leads to stronger nuclear charge and less tendency to lose electrons and react with other elements.
What happens when prime numbers increase?
Not quite sure what you mean; as you go to larger and larger numbers, the percentage of prime numbers gets less, but it never stops entirely. The number of prime numbers up to a number "n" is roughly equal to n / ln(n), where ln() is the natural logarithm.
What happens if some more cats in the wild became endangered?
We will have to save them to increase their numbers
What happens to the number of prey as the number of predator decreases?
The numbers of prey will normally increase.
What are the rules for reactivity of metals on the periodic table?
The reactivity increases with increasing numbers of electron shells (energy levels).
Do elements in the same group have similar atomic numbers?
Elements in the same group have similar chemical properties but not necessarily similar atomic numbers. Elements in the same group have the same number of valence electrons, which determines their reactivity and chemical properties.
What happens to antibodies numbers when fighting an infection?
They increase. A normal level is around 10 for a white blood cell count, but this can increase to hundreds in cases of severe infection.
What useful functions do oxidation numbers serve?
Oxidation numbers help determine the amount of electrons an atom has gained, lost, or shared in a compound. They are useful for balancing chemical equations, predicting the reactivity of elements, and identifying the type of chemical bond present (ionic or covalent). Additionally, oxidation numbers play a crucial role in understanding redox reactions and determining the oxidation state of elements in compounds.
