Complete the third column of the table.

Q: Should the elemental symbol for lead be written as Pb or PB? What confusion could arise if the wrong…

A: Elemental symbol for lead is Pb and it should be Pb .

Q: What is the atomic number for the element that is in group IIIA(13) and period 4? Atomic number =…

A:

Q: Recognizing the intersection of scientific properties and ideas with the world around you is a key…

A: The objective of this question is to choose a favorite element from the periodic table, describe its…

Q: HNO3 NBS H,SO4 light AICI3 Fe HCI

A: Chemical reaction:

Q: A fictitious element only has two naturally occurring isotopes: X and Y. Isotope X has a mass of…

A:

Q: While cleaning your attic, you found your old rock collection. If 83.58% of the rocks have a mass of…

A:

Q: Figure 3. Diatomic molecules of the element chlorine, Cl2. This Figure 4. Molecules of the compound…

A: ⇒All atoms are made up of tiny particles ie,protons,neutrons and electrons⇒A n element is a pure…

Q: Specify the number of protons and electrons in each of the following ions. A) Se^2−, needed for…

A: To specify the number of protons and electrons we will use the following concept . Since we know…

Q: -23 An oxygen atom has a mass of 2.66 x 10 g and a glass of water has a mass of 0.050 kg. Use this…

A:

Q: g and a small airplane has a mass of 5000. kg. An aluminum atom has a mass of 4.48 × 10 Use this…

A: Mole concept: The number of molecules or atoms present in the one mole of the substance is equal to…

Q: An element has two isotopes. One isotope has a mass of 63.22 g. The other has a mass of 67.88 g. If…

A: An isotope of an element contains different number of neutrons in their nucleus. That is, isotopes…

Q: Density of the hydrogen atom Use the information below to calculate the density of the hydrogen-1…

A: Given : Radius of hydrogen atom = 53 pm Since 1 pm = 10-10 cm Hence radius of hydrogen atom in cm =…

Q: Magnesium, Mg Strontium, Sr Barium, Ba E Radium, Ra :::: :::

A: We know that on going left to right atomic radii decrease and on going from top to bottom atomic…

Q: An imaginary element (x) on Mars is composed of two isotopes, 54.93% of isotope x-34 with a mass of…

A:

Q: Should the elemental symbol for lead be written as Pb or PB? What confusion could arise if the wrong…

A: Atom is made up of nucleus (proton and neutrons) and electrons are revolving around it.

Q: Should the elemental symbol for lead be written as Pb or PB? What confusion could arise if the wrong…

A: We know that, Lead is an element with the  atomic number 82 and its symbol is Pb . It is a metal and…

Q: Atoms combine to form bonds compare and contrast how ionic and molecular compounds formed? Explain…

A: 9. Atoms are combined to form molecule. The force behind this combination is known as bond. Bonds…

Q: Compound Description J K L colorless, odorless gas 3-33 g colorless, odorless gas 3.52 g Mass of…

A: To answer following questions, we would first determine the chemical formula of all compounds by…

Q: the

A: Solving for Integer Value of m 37 −150/m = −13

Q: Based on the information in the table, Sample 3 would likely be classified as a(n) —    alkali…

A: Alkali metals , valance band conduction band overlap on each other . Thus free electrons  can easily…

Q: Consider a sample of carbon tetrafluoride that contains 2.13 × 1024 atoms of fluorine. Using the…

A:

Q: . Investigate the history of the discovery of chemical elements. What was the most recent element to…

A: History of the discovery of chemical elements: The discovery of the 118 chemical elements known to…

Q: g and a small airplane has a mass of 5000. kg. An aluminum atom has a mass of 4.48 × 10 Use this…

A: The mass of 1 aluminum atom is .The mass of an airplane is 5000. kg.To find the mass of 1 mole of…

Q: 2.) Suppose you're attempting to measure the density of a liquid that is highly volatile (it…

A:

Q: Question The ratio of the ions in an ionic compound depends on the charges of the ions. The amount…

A: The compounds given in the table are all ionic compounds.

Q: Complete the third row of the table with the number of protons, neutrons, and electrons for 30Si.…

A:

Q: A monatomic ion with a charge of +2 has an electronic configuration of 1s 2s 2p°3s²3p°. This ion is…

A:

Q: Organization of the Periodic Table Read each description in the first column of the table below. If…

A: Given a table about description of element with atomic number 92 or less 92. Which description…

Q: Which of the following elements is not a representative element? O Nickel Cadmium Silicon O Barium

A: I A, IIA, IIIA, IV A, VA, VI A, VII A, VIII A elements are called representative elements. Between…

Q: Use the References to access important values if needed for this question. 1A 8A H 2A 3A 4A SA 6A 7A…

A: Isoelectronic species are the species having same electrons. Electron of Cl- = (17+1)= 18e-…

Q: State the number of protons in Al^3+ Express your answer as an integer.   State the number of…

A: The element Al has atomic number = 13. Number of protons of an element is equal to atomic number of…

Q: Marie Curie was a Polish scientist that specialized in chemistry and physics. She wanted to…

A: Marie Curie  Marie Curie is renowned for discovering radium and polonium, as well as for making a…

Q: Protons and electrons have charges of the same magnitude but opposite sign. true or false?

A: A question about charge and magnitude relationship between protons and electrons.

Atoms and Molecules

An atom is the smallest unit of an element that possesses all the properties of that particular element. Molecules are the smallest unit of a substance that possess all the properties of that particular substance.