Explanation

• Atomic radius decreases along a period as you move from left to right.
• This is because the number of protons in the nucleus increases, which pulls the electrons closer to the nucleus, resulting in a smaller atomic radius.

Explanation

Explanation

Explanation

One mole of any substance contains Avogadro's number of particles.  

So, 1 mole of NaCl contains 6.022 × 10²³ formula units.

Explanation

• An atom typically has an equal number of electrons and protons.
• They are equal in number to the atomic number (Z) of the element.
• This number is unique to each element and determines the properties of the element.

Explanation

• Across a period: Ionization energy increases (stronger nuclear charge).
• Down a group: Ionization energy decreases (electron shielding + distance).
• Exceptions within a period:
  • Group 13: slight dip (new p subshell).
  • Group 16: slight dip (electron pairing repulsion).

Explanation

A scalar matrix is a diagonal matrix where all diagonal elements are equal (here, 2), and non-diagonal elements are zero.

Explanation

A nurse works at a hospital.

Teacher – works at a school,

A teacher is directly involved in the school’s primary function (education),

Just like a nurse is involved in healthcare at a hospital.

Explanation

The tallest TV tower in Asia is the Tokyo Skytree.

It stands at 634 meters (2,080 ft) and is located in Tokyo, Japan. 

A) Tokyo Skytree: 634 meters (tallest)

B) Canton Tower: 604 meters (second tallest in the world at the time of its completion, but surpassed by Tokyo Skytree)

C) Oriental Pearl TV Tower: 468 meters

D) Kuala Lumpur Tower: 421 meters (although this is a common measurement, another source lists it at 1,381 ft or ~421m, as opposed to the 1381 ft from Fact Monster) 

Explanation

In common logarithms, the mantissa is the fractional part of the log value and is always taken as a positive decimal between 0 and 1.