1) This question is about thePeriodic Table.a) How many elements are there in period 3 of the Periodic Table?___(1)b) Place the first 3 elements of period 3 in order of increasing reactivity.___(1)c) Explain your reasoning to part (b).___ (-)d)Mark with an the statement that...
At present, 118 elements are known to us. All these have different properties. Out of these 118, only 94 are naturally occurring.
How many atoms of cobalt are in a 0.48-mole sample of Co(C2H3O2)3? How many moles of oxygen are there in sulfur trioxide? How many moles of sulfur dichloride are present in 3.81 x 10^{22} molecules of this compound? How many atoms of sulfur are present in 9.36 grams of sulfur di...
How many moles are there in 1.8 x 10^(24) atoms of sulfur (atomic number 16)? How many atoms of iron are there in 2.76 moles of each of the following: wolframite, FeWO4? Calculate the mass in grams of 0.494 moles of vanadium. How many moles of iron atoms are contained in 3.49 g...
1几道英语化学题!1.how are the atomic numbers and the atomic masses of the elements related to how the elements are arranged on the periodic table?2.how does the number of electrons relate to the arrangement what is the different in the number of electrons in a 3rd period element and the...
We may have many differences among us; different classes, beliefs, countries, occupations, and even tastes, but one thing that all of us have in common is our microscopic blueprint… we are all made of atoms. This isn’t just shared among fellow humans; rather, it is the case for every...
Elements:Elements are composed of only one type of atom. There are 118 elements known to scientists. Among these are: gold, silver, mercury, lead, bismuth, and antimony.Answer and Explanation: Up to 83 elements can be found in the human body. However, the vast majority of these only ...
Step-by-Step Text Solution:1. Understanding Essential Elements: Essential elements are those that are necessary for the normal growth and reproduction of plants. If a plant lacks any of these elements, it will
To determine how many elements are present in the d-block of the periodic table, we can follow these steps:Step 1: Identify the d-block Elements The d-block elements are also known as transition metals. They are found in groups
Atoms are the basis of all the elements in the universe, the building blocks of all visible matter, and the secret to nuclear power.