Answer: option (4) thallium.
Explanation:
1) You have to look at the normal boling and mleting points of the elements.
2) To be liquid the normal melting point must be lower than 758 K and the normal boiling point must be greater than 758 K.
3) The look at the data in a handbook of properties or in internet, and build a table.
4) The given temperature, 758K, is 758 - 273.15 = 484.85 °C.
Element Normal melting Normal boiling State at 484.85 °C
point (°C) point (°C)
(1) gold 1064 2700 solid
(2) silver 961.8 2162 solid(3) platinum 1768 3825 solid
(4) thallium 303.5 1457.8 liquidThen, the only element of the choices whose melting point is less than 758 K (484.85) and its boiling point is greater than that, at 1 atm is thallium. So, it is liquid.
c. external conflict.
b. climax.
d. internal conflict.
Answer:
Explanation:
In chemistry, elements and compounds are distinct types of substances with fundamental differences:
**Elements:** Elements are the simplest and purest substances in chemistry, consisting of only one type of atom. Atoms are the building blocks of matter, and each element is defined by the number of protons in the nucleus of its atoms. Elements are listed on the periodic table, where each element is represented by a unique chemical symbol. They cannot be broken down into simpler substances by chemical reactions. For example, oxygen (O), carbon (C), and gold (Au) are all elements.
**Compounds:** Compounds, on the other hand, are substances formed when two or more different elements chemically combine in fixed ratios. These combinations involve chemical bonds, where atoms share electrons or transfer them to achieve stable electron configurations. Compounds have unique chemical formulas that represent the types and numbers of atoms in the compound. Unlike elements, compounds can be broken down into their constituent elements through chemical reactions. A classic example is water (H2O), which is a compound composed of two hydrogen atoms and one oxygen atom.
In summary, elements are pure substances composed of identical atoms, while compounds are substances formed by the chemical combination of two or more different elements in fixed ratios. Elements are found on the periodic table and cannot be broken down further by chemical means, whereas compounds can be decomposed into their constituent elements through chemical reactions.
Answer:
Explanation:
In chemistry, elements and compounds are distinct types of substances with fundamental differences:
**Elements:** Elements are the simplest and purest substances in chemistry, consisting of only one type of atom. Atoms are the building blocks of matter, and each element is defined by the number of protons in the nucleus of its atoms. Elements are listed on the periodic table, where each element is represented by a unique chemical symbol. They cannot be broken down into simpler substances by chemical reactions. For example, oxygen (O), carbon (C), and gold (Au) are all elements.
**Compounds:** Compounds, on the other hand, are substances formed when two or more different elements chemically combine in fixed ratios. These combinations involve chemical bonds, where atoms share electrons or transfer them to achieve stable electron configurations. Compounds have unique chemical formulas that represent the types and numbers of atoms in the compound. Unlike elements, compounds can be broken down into their constituent elements through chemical reactions. A classic example is water (H2O), which is a compound composed of two hydrogen atoms and one oxygen atom.
B- active volcano
C- extinct volcano
D-lava filled volcano
Answer:
B active volcano
Explanation:
The protons are located inside the nucleus and have a positive charge.
The electrons are located outside the nucleus and have a negative charge.
The neutrons are located inside the nucleus and have no charge.
Explanation:
Learn more about subatomic particles here:
I just did it, the correct answer is actually D. They are experimentally determined exponents.
(3) ionic
(4) metallic