What is the neutral atom that has its first two energy levels filled, has 5 electrons in its third energy level, and has no other electrons? Enter the name of the element, not the abbreviation. element name:

When reading the periodic table there are Periods (rows) and Groups/ Families (columns).   Describe what the group number represents (the numbers at the top of each column)  Describe what the period number represents (the number on the far left side of each row)

The following depicts two images related to atom structure. The image on the left describes an atomic theory. The image on the right describes the results of a test used to further determine the structure of the atom. Electrons scattered throughout ● (a) Expected Results D Diffuse positive charge Path of < particle Assuming that the arrows are streams of "alpha" radiation Use the image to determine whether the "alpha radiation" is positively or negatively charged. Explain how you arrived at your conclusion. Cite evidence from the image(s) in your explanation. (b) Actual Results

How many electrons are present in an atom that has its first and second shells filled and has 4 electrons in its third shell? Name the element.

Fill in the blanks to complete the following table.   Row Element Name Element Symbol Atomic Number 1 -- AgAg 47 2 Tin -- -- 3 -- SeSe -- 4 Cobalt -- 27 5 -- CrCr -- 6 -- -- 46 Part A Fill in the blanks of the Element Name column of the table. Enter element names separated by commas. Enter your answers in order from the top to the bottom of the table.   Element Name rows 1, 3, 5, 6 = Element Symbol rows 2, 4, 6= Atomic Number rows 2, 3, 5 =

Adding one proton to the nucleus of an atom does not change either its atomic number or its atomic mass. increases its atomic number by one unit but does not change its atomic mass. converts it to an isotope of the same element. converts it to an atom of a different element.

1 If element A has a charge of 4 and element B has a charge of -3 what would the proper ionic formula be for their combination?

Click in the answer box to activate the palette. Write the isotope symbol that fits the description, using a superscript for the mass number and a subscript for the atomic number. An element with 7 electrons and a mass number of 13:

a) Compare the number of protons, neutrons, electrons, and nucleons for the two isotopes: Li-6 Li-7 number of protons number of neutrons number of electrons number of nucleons b) Chemical reactions only involve the outermost electrons. Why would you expect the two isotopes of lithium to have the same chemical properties ? c) Do neutrons affect chemical properties ? d) How is the number of protons related to the chemical properties ?