Which element is the world's lightest metal and increasingly a vital component of batteries used in small electronic devices? lithium O mercury iron lead silver

Q: Radiation is the emission and propagation of high speed electrons in an x-ray tube in the form of…

A: Introduction X-rays are a type of radiation called electromagnetic waves. X-ray imaging creates…

Q: Chlorine has seven electrons in its valence shell. It accepts an electron to complete its octet and…

A: The chloride ion acts as an electrolyte and is present in all bodily fluids. It helps in the…

Q: The mass number for an isotope is 14. This isotope could be: a carbon atom with 8 neutrons an oxygen…

A: Mass number of an atom is the sum of the number of protons and neutrons in the nucleus of the atom.…

Q: Determine the mass in grams of 2.10 × 10²¹ atoms of copper. (The mass of one mole of copper is 63.55…

A: Molar mass is defined as the ratio of the mass of the substance (m) to the moles of substance (n)…

Q: Which of the following substances will have the greatest lattice energy? MgS NaF MgO CaO

A: Lattice energy can be defined as the energy required to convert one mole of an ionic solid into…

Q: Element X is a major element in the human body and also known as electrolytes. As a biomedical…

A: Electrolytes are particles that carry a positive or negative charge. These are essential minerals…

Q: The content of calcium in Al-Jabal Al-Akhdar bottled drinking water is 7.9 mg per liter. How many…

A: Given: - In 1000 mL (1 liter) of drinking water = 7.9 mg calcium So, in 1 mL of water, the calcium…

Q: With the exception of He, elements with two valence electrons will be considered: O Metals…

A: A valence electron is an electron that is associated with an atom, and that can participate in the…

Q: What do you call to the unit amount of a substance used for measuring large quantities of very small…

A: The mole (particularly millimoles and molarity) is a commonly used unit in medicine. For example,…

Q: A lithium atom has 3 protons and 4 neutrons. What is itsmass number?

A: The atomic mass number represents the total number of protons and neutrons present in the atom,…

Q: The percentages of naturally occurring elements making up the human body (see Table 2.1) are similar…

A: Introduction: The requirement for trace elements might actually be viewed as a synapomorphy.

Q: Which element is the world's lightest metal and increasingly a vital component of batteries used in…

A: Metals are solid opaque  elements that has good conductivity of heat and electricity. Lightness of…

Q: On the periodic table of the elements, mercury (Hg) hasan atomic number of 80 and a mass number of…

A: Atom is the smallest unit of matter and it cannot be broken down into smaller units. It is the…

Q: Which of the following is not an equivalent to ppm? a.mg/L b.ug/g c.g/ton d.uL/mL x 106

A: The abbreviation of ppm is ‘parts per million'. It is also expressed as milligrams per litre (mg/L).…

Q: Some dried beans with a 14C/12C ratio one-eighth of the current value are found in an old cave. How…

A: The primary way for the age determination of an old sample is carbon dating. The carbon-14 is…

Q: a certain element consists of two stable isotopes. the first has a mass of 138 amu

A: Atoms of an element having same atomic number but different mass number are called isotopes of that…

Q: If 10 magnesium atoms and 10 chlorine atoms were allowed to bump into each other, could they combine…

A: Magnesium and Chlorine combine to form salt magnesium chloride, MgCl2, where one magnesium cation…

Q: Molecules that are found in living cells and contain the element___________ are considered organic…

A: Cell, in science, the essential membrane-bound unit that contains the central molecules of everyday…

Q: Describe the characteristics of transition metals.

A: Elements that have d orbit partially filled are known as Transition elements. These metals come…

Q: Which of the following correctly identifies the number of each element involved in the chemical…

A: The chemical formulas of a given molecule represent the simple ratios or the number of molecules of…

Q: At room temperature, substance 1 is a gas while substance 2 is a liquid. Which of the following is…

A: A state of matter is defined as one of the distinct forms that various phases of matter take on. The…

Q: if 10 magnesium atoms and 10 chlorine atoms were allowed to bump into each other, could they combine…

A: The study of chemical reactions that occurs within living organisms is called biochemistry. This…

Q: Why are the elements found in the I=P x A x T important in terms of them having an impact to our…

A: Any organism cannot survive in isolation. It is surrounded by a number of biotic and abiotic…

Q: How many grams are in 0.250 moles of lithium carbonate ?  a) 12.225 b) 18.47 c) 18.5 d) 16.5

A: The molecular formulae of lithium carbonate are Li2CO3.

Q: Elements are.. O A pure substance When there is more than one atom O Made of two or more substances

A: The matter is made up of chemical substances that occupy space and it consists of a particular mass.…

Q: If you add an electron to fluorine, what will result? A) a negatively charged anion O B) a different…

A: Anion: negatively charged ion. Cation: positively charged ion.

Q: the following? A. Thiamine B. Selenium C. Zinc

A: The clinical scenario is suggestive of keshan  disease which is an endemic cardiomyopathy found in…

Q: _____________ compounds exclude water.

A: Rule of thumb that states that "like dissolves like" which means that polar molecules are dissolved…

Q: Copper(II) acetate containing 6Cu is used to study brain tumors. This isotope has a half-life of…

A: Time elapsed = 63.5 hours Half-life of 64Cu = 12.7 hours

Q: determine the density of a metal that has a mass of 2.17g and a volume of 0.35 cm^3

A: The unit of density is gm/cm3 .

Q: . An analysis water from well No 9 of the Manhattan beach, California, water composition showed :…

A: Here the cations are:  Calcium, Magnesium, Potassium, Sodium here the anions are: Silica,…

Q: An isotope of sodium (Na) has a mass number of 22. How many neutrons does it have?a. 11b. 12c. 22d.…

A: Isotopes are members of a family of an element that all have the same number of protons but…

Q: 95.859 The mass of the object is 95.85 grams The weight of the object is 95.85 grams The mass of the…

A: There are several measurement instrument that are used in the laboratory to measure different types…

Q: (i) MnO is basic whereas Mn207 is acidic in nature. Why? (ii) Transition metals form alloys. Why?…

A: Chemical compounds are the important basis of life. The compounds that are obtained from living…

Q: Ethyl mercaptan is an odorous substance added to natural gas to make leaks easily detectable. A…

A: Given: Ethyl mercaptan is an odorous substance added to natural gas to make leaks easily detectable.…

Q: a 139 ng sample of radioactive material has a half life of 4.2 days how many ng of radioactive…

A: GIVEN: The initial mass of radioactive material = 139 ng Half-life =4.2 days Number of half lives= 3…

Q: s of 13.77 grams. Find t

A: Volume=5.10cm3 Mass=13.77 gram Density= Mass/Volume=13.77/5.10 =2.7g/cm3

Q: the percentage of naturally occurring elements making up the human body are similar to the…

A: Out of 100 naturally occurring elements, about 25 are forund in all living organisms. Oxygen,…

Q: A mineral is a naturally occurring solid that is composed of many inorganic materials. Which of the…

A: Features of minerals Naturally occurring substance. Should not be man made Is  Composed of…

Q: Why do you think compounds containing the heavy metal lead are poisonous?

A: Heavy metals are chemical elements that have high density and very toxic or poisonous even at their…

Q: What is formed when an atom loses or gains an electron? O a. ion O b. bond O C. molecule O d. a new…

A: Molecules of every substances are made up of small particles. These are called atoms. Bohr's model…

Q: Element Characteristics Easy to bend and shape • Good conductor of heat • Good conductor of…

A: The metals are substances that has high conductivity and high electricity.

Q: Ammonia gas would be classified as (1) a compound (2) a mixture (3) an element (4) an atom

A: AMMONIA GAS IS CLASSIFIED AS COMPOUND.

Q: OCCURS IN WATER WITI 1. cobalt 2. strontium 3. selenium 4. vanadium

A: Osteoarthritis, also known as degenerative joint disease (DJD), is one of the most common type of…

Q: Which element is a metal? A. C B. Rn C. CI D. Cr

A: The classification of chemicals into different groups and understanding their properties individual…