Class Of Forensic And Investigative Sciences

This chapter covers the basics that you may have learned in your chemistry class. The questions that follow

5) List the three common states of matter in order of highest potential to lowest.

3. Find the number of atoms of each of the substances involved in the reaction.

The identity of each element is defined by the number of protons in its nucleus

E. have different numbers of electrons. Correct See Section 2.1: How Does Atomic Structure Explain the Properties of Matter? Points Earned: 1/1 Correct Answer: D

a. atoms lose electrons if they have just one or two electrons in their valence shells; they gain electrons if they need just one or two electrons to complete the valence shell as in K+CL- __Ionic bonds_

We can use the small numbers to give information about the particles in the nucleus.

The main point of lecture was to continue discussing about the light spectra and atoms. Specifically, we used the equations and calculated a photon of light’s energy at a certain wavelength. Also, we discussed the light spectrum and how particular wavelengths of light are absorbed by matter.

Explain how scientific observations led to the development of, and changes to, the periodic table.

I can use these three values to characterize the structure, charge, and the mass of an atom by using the knowledge I know already. In the problem this atom has 3 protons so its atomic number will be 3 and its mass number equal the number of protons plus number of neutrons equal which you can write like this 3 + 4. The problem 3 + 4 will equal 7. This atom also has 3 electrons, balancing the charge of 3 protons that exist in its nucleus, concluding that this atom has an atomic number of 3 and a mass number 7. The element is

The element I’m doing research on is Neon. Neon is usually used for advertising. For example, the Las Vegas sign uses neon so it can have a bright light or shine in the dark. The element’s chemical symbol on the periodic table is ‘Ne.’ It’s really easy to spot the symbol on the periodic table since it uses the first two letters in the actual word, Neon. The atomic number is shown above the element’s symbol on the periodic table. The number represents how many protons and neutrons it has. In this element, the number is 10, which means there’s 10 protons and neutrons. The atomic mass tells us the mass of the atom, for neon the mass is 20.180. In the periodic table, the mass is usually located underneath the chemical symbol. For each atom, every

The main component that make up an atom are protons, electrons and neutrons. Protons are positively charged. While electrons are negatively charged. Neutron is not like a proton or an electron. It isn't like proton or an electron because a neutron does not have a charge. They are arranged by the atomic number. The atomic number is the number of protons in the nucleus of an atom and the electrons are arranged in levels. The atomic number is the small number that is at the top left corner of the element in the box. Copper has twenty nine electrons and twenty nine protons. Copper has two isotopes. Which are copper 63 and copper 65. Their compositions of copper 63 and 65 are stable. The abundances of copper 63 is 69.15 percent and copper 65 is

The atoms of each element possess a unique electron configuration because of the fact that different elements have different numbers of electrons. The ground state electron configuration shows both the lowest and most stable position for each element. There are three basic rules used for determining the ground-state electron configurations.

For example, Neon which have atomic number of 8, acts like an inert gas. Meanwhile group 1 element Sodium which have atomic number of 11, reacts vigorously with water. Such characteristic have made elements unique from each other. Choice C. Mass number, is an incorrect answer. Mass number is the total number of proton and neutron of the element.

An Atom is the the basic building block of all matter. Atoms are made up of Particles, called: Protons, neutrons and Electrons. Protons carry a positive charge, the neutron carry 's a neutral charge and the electron carry’s a negative charge. The Atom has two main parts the Nucleus and the Electron Shell. The Nucleus contains the Protons and Neutrons. The electron Shell Contains the The electrons.