Which statement accurately compares the trends in atomic number and atomic mass in the periodic table?

valency in the periodic table across a period first increases and then decreases. there is no change going down a group. however, this periodic trend is sparsely followed for heavier elements (elements with atomic number greater than 20), especially for lanthanide and actinide series.

explanation:

periodic trends, or periodicity, appear with remarkable accuracy for many physical and chemical properties. the size, mass, reactivity and other atomic properties have few exceptions as you move from left to right and top to bottom on the modern periodic table.   shells closer to the nucleus—those with a smaller radius—are generally filled first, since the negatively charged electrons are attracted by the positively charged protons in the nucleus. as the atomic number increases along a row of the periodic table, additional electrons are added to the same, outermost shell.

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i do believe its (d) it allowed the government to offer pioneers sixty acres of western land if they lived on it and made improvements to it.

explanation: signed into law in may 1862, the homestead act opened up settlement in the western united states, allowing any american, including freed slaves, to put in a claim for up to 160 free acres of federal land. by the end of the civil war, 15,000 homestead claims had been established, and more followed in the postwar years