Appl Of Ms Excel In Analytical Chemistry
2nd Edition
ISBN: 9781285686691
Author: Crouch
Publisher: Cengage
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Enter the following information. Enter all numerical answers as numbers, i.e. "1", not "one.
Hint: most common ion of cesium
Element name: Cesium-130
Isotope symbol (A Echargey
A=
Z=
E=
Charge=
Mass:
# of Neutrons:
# of Protons:
# of Electrons:
An imaginary element (x) on Mars is composed of two isotopes, 54.93% of isotope x-34 with a mass of 34.0 amu, and isotope x-37 with a mass of 37.0 amu. Calculate the atomic mass (in amu) of the element. Round and report your answer to a number with one decimal place.
The astronaut then measures the abundance
of silicon on the new planet, obtaining the
following results:
Abundance
Mass
Isotope
(%)
(amu)
28 Si
73.71
27.98
29 Si
14.93
28.98
30 Si
11.36
29.97
What is the atomic mass of silicon for this
planet?
Express your answer to two decimal
places, and include the appropriate units.
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- Learning Goal: This question reviews the format for writing an element's written symbol. Recall that written symbols have a particular format. Written symbols use a form like this: 35C1 In this form the mass number, 35, is a stacked superscript. The atomic number, 17, is a stacked subscript. "Cl" is the chemical symbol for the element chlorine. A general way to show this form is: mass number Symbol atomic number It is also correct to write symbols by leaving off the atomic number, as in the following form: 35Cl or mass number Symbol This is because if you write the element symbol, such as C1, you know the atomic number is 17 from that symbol. Remember that the atomic number, or number of protons in the nucleus, is what defines the element. Thus, if 17 protons are in the nucleus, the element can only be chlorine. Sometimes you will only see 35 C1, where the atomic number is not written. Watch this video to review the format for written symbols. In the following table each column…arrow_forwardI Review | Constants | Periodic Table The following diagram(Figure 1) is a representation of 20 atoms of a fictitious element, which we will call nevadium (Nv). The red spheres are 203 Nv, and the blue spheres are 295 Ny Assuming that this sample is a statistically representative sample of the element, calculate the percent abundance of each element. Express your answers as integers. Enter your answers numerically, separated by a comma. Figure 1 of 1 ΑΣφ ? % abundance 293 Nv. % abundance 295 Ny = Submit Request Answer Part B Complete previous part(s) Provide Feedback Next >arrow_forwardLEARNING TASK 1: Complete the following sentences by filling in the appropriate word from the list below. Write your answer in the box below. Do not forget to turn in/ hand in your work. Thanks Periodic Table Compound Symbols Carbon Element Pure Letters Properties Atomic Number Mendeleev Carbon Dioxide Metal 1. cannot be separated by physical or chemical means. 2.Elements are abbreviated with which consist of one or two 3. Elements are organized on the according to their 4. Two or more elements chemically combined make up a 5.. is an example of an element and is an example of a compound. 6. Elements and compounds are called have a unique set of chemical and physical substances because theyarrow_forward
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